Lucky, a girl from the city, arrives in the frontier town of Miradero, and tries to fit in, but struggles at doing so. However, she becomes friends with a wild horse, Spirit, after he is wrangled.

Lucky convinced one of her new friends, Pru, to tell her how to ride a horse so she, and her horse, Spirit, can participate in an upcoming saddle club ride.

On a camping trip with her friends, Lucky attempts to decode an old map once taken by her dad, and works with her friends to find the supposed treasure.

In an attempt to be appreciated at school, Lucky works with Maricela at a school event, putting her in direct competition with her friends Abigail and Pru.

Lucky and Turo, a saddlemaker, work together to save a horse mistreated by a man named Grayson while her dad tries to stop a dam from bursting apart and causing destruction.

In an attempt to give Pru a surprise party for her birthday, Lucky asks Abigail to help her, but soon everything goes horribly wrong.

Lucky eagerly accepts lessons from Javier, a new performer skilled in trick riding, in an attempt to follow in the footsteps of her mother.

When a cherry pie which Abigail made goes missing, Lucky acts as a detective with the help of her friends, taking lessons from her favorite "Boxcar Bonnie" books.

Julian, one of Lucky's cousins, comes to town, but Lucky, remembering his past schemes, is concerned that he is only out to swindle more people after her friends are charmed by him.

Still in town, Julian declares, at a local scavenger hunt, that his team of boys will find, and make, a scarecrow, before the team of girls, headed by Lucky, can do so.

The Christmas celebrations of Miradero seem to be put on hold because of a huge blizzard, but Lucky has the brilliant idea to give gifts to people across the town to keep everyone in the holiday spirit.

Lucky and an unlikely ally, Maricela, work together to make sure that vital flu medicine, on a train bound for Miradero, makes it to the town and stops the growing epidemic.

Lucky learns of an upcoming race, and angry that only men can enter, she decides to do so anyway, posing as a man. However, she faces off against Grayson, putting herself, and Spirit, in danger.

Spirit goes on a long trek to get home to his herd and to be near Lucky, at any cost, even if it puts his life on the line.

Lucky hosts a "charm school" for her friends, Abigail and Pru, attempting to teach them ladylike manners for an upcoming ball. But a birth in Spirit's herd from one of the mares threatens to disrupt their "civilized" duty.

After accidentally going on Grayson's land, Lucky and her friends hatch a plan to save a 16-year-old Tuckapaw man, Mixtli, from being sent to his tribe's reservation and bring him back together with his horse.

With kids in the schoolhouse declaring she is the "teacher's pet," Lucky attempts to cause trouble at a field trip to show they have the wrong idea.

After the town is damaged by an earthquake, Lucky, Pru, and Abigail discover that a critical bridge for the railroad has been destroyed. They try to warn the train to stop, so that passengers, like Lucky’s her dad, are not killed.

Lucky and her friends find what they believe to be an abandoned gold mine. When Abigail accidentally tells Lucky's cousin, Julian, problems ensue.

Lucky, Pru, and Abigail, show Aunt Cora how to ride a horse, so she can impress the Daughters of Miradero. Meanwhile, a mountain lion threatens the herd, putting Spirit in danger.

Pushed out of the barn to let Spirit recover by Mr. Granger, Lucky helps Mr. Winthrop by giving people ice cream cones and sundaes. But she runs into trouble when she starts giving people advice, leading her to quickly become overwhelmed.

For her thirteenth birthday, Lucky has a O-Mok-See planned, but when her grandpa, James Prescott Sr., comes to Miradero, he has his own plans.

With the departure of Aunt Cora, Lucky and her dad begin to spin out of control, and the house starts becoming a mess. Nothing seems to be going right for them, not even a play at school!

While Lucky attempts to keep Aunt Cora in Miradero, going to any level to do so, she loses confidence and decides to accept the inevitable until her friends give her a morale boost.

When a traveling circus comes to the town, with Lucky feeling connected to her mom more than she ever has, Miss Flores feels like she isn't wanted. In the meantime, another horse in the herd tries to fight Spirit and gain control over the herd.

Lucky agrees to fill in when another circus performer is hurt and do some of her mom's old tricks. But, she is disappointed and angry when it she believes that her dad is putting Miss Flores ahead of her.

Lucky struggles to find her footing at the circus, feeling she doesn't belong until her friends Pru and Abigail arrive, agreeing to stay with her.

Lucky attempts to protect her new family of circus performers from a bandit, while Pru unintentionally conquers her fear of the stage.

The circus troupe come upon a town hostile toward circus folk and are told to leave. Lucky and her friends, however, plan a secret show for the children who can't see their show. Lucky has to decide for herself, if she will stay with the troupe, or if she will return home to Miradero.

Lucky begins to re-adjust to her home in Miradero and tries to be nicer to Miss Flores, as she begins teaching her how to ride a horse. Lucky and her friends are surprised by new changes in town, with Lucky trying to pass this off like nothing has changed, even as she get more anxious with the new changes.

Mrs. Granger is invited to class by Miss Flores to teach the students about what to do when accidents happen. Later, the PALs excitedly join Mr. Granger on a mustang drive, and when Lucky sees that the Javier is coming along, she gets even more excited.

After Aunt Cora tells Lucky she is too old to do Halloween, with the moms of Pru and Abigail saying the same, they decide to do something more fun than trick-or-treating: re-enact the legend of Sadie Cruthers.

The PALs go on their own camping trip, with Abigail telling Lucky about the Frontier Fillies, a group for girl adventurers. The PALs decide to travel to the religious orphanage where Miss Flores grew up, but on the way, something goes horribly wrong.

When the drought strikes Miradero, all the water dries up, Grayson offers water from his well for the townspeople to use, but makes them pay for it. Lucky, suspicious of him, convinces Pru and Abigail to investigate how, and why, the well on Grayson's ranch is the only one which has water.

As the PALs prepare for their slumber party, Mr. Granger shows new Arabian mares brought into the barn. Later, when Pru does more than her regular chores, it gets a bit out of hand.

Pru and Lucky are practicing a play about poison ivy for the Frontier Fillies, a group for girl explorers with the help of Abigail, but their preparations are ruined by Snips entering the barn. Can they still become part of explorer group, or will they be unsuccessful?

As the kids in Miss Flores's class read New Years resolutions they made at the beginning of the year, Lucky realizes she didn't do all the resolutions she made at the beginning of the year and vows to complete them before the year is over.

Lucky, Miss Flores, and Jim take family photographs together. Later, Lucky is intrigued by telegrams from her cousin, Julian, in Silverlode, surprising Pru, even as Abigail says it would be exciting. Julian has a plan to "rob" Lucky, by planting something valuable. But will it work or will it go horribly wrong?

Lucky, busy with Kate moving into the house where she lives with her dad, forgets to bring rings to a practice wedding Pru and Abigail are holding in the barn, and Abigail warns Lucky that something will go wrong since she believes in superstitions.

After Butch LePray kidnaps Jim Prescott, Lucky escapes and hatches a plan with Pru and Abigail to save her dad. While Lucky suspects Grayson at first, he later turns out to be an unexpected ally.

Annoyed with Julian, especially when he gets out of doing chores, she is impressed when she sees his hot air balloon, and the PALs agree to go on a ride. But, everything goes wrong when Julian, Lucky, and Aunt Cora fly into the sky without the tether.

The PALs prepare April Fools pranks, but Pru and Abigail warn Lucky against pranking Maricela. Even so, Maricela wants to be pranked, surprising Turo, with the PALs confused by her behavior.

While Lucky is really excited about having a new sister, Aunt Cora, Kate, and Jim are worried, calling her distracted and irresponsible. Lucky later tries to prove she is responsible even if it involves babysitting Snips on the day every year he gets his haircut.

Its winter in Miradero and the PALs are sled riding on the snow. They find wagon tracks and go to investigate, finding a crashed cart, a horse, and a man, who they bring back to the town, but it turns into a situation that is more than they bargained for.

The PALs are riding through town and they are intrigued by the gramophone at the Mr. Wintrop's general store. While Abigail laments they can't get the money to buy it, Pru floats the idea of them getting part-time jobs to pay for it, which Lucky enthusiastically accepts. But, after they accidentally break Grayson's window after they try to return his watch, they have to work at his ranch to pay him back, but Abigail attempts to become Grayson's friend to the chagrin of Lucky and Pru.

Pru and Lucky are excited about becoming Frontier Fillies, but Abigail tells them they need to earn 12 badges to become full-fledged Fillies and move on from being Clippitty-Cloppers. Lucky proposes they do the Clippity-Cloppers Wilderness course so they can earn enough badges and become Fillies. They are surprised when they find Mr. Granger and Jim in the barn, who both agree to help them.

Lucky travels on a train with her dad and pregnant mom from Miradero to Cedar Gulch, a railroad outpost, with her dad overseeing the railroad's progress. After spending some time with her mom and dad, Lucky goes out riding, exploring the frontier, and attempts to save a pack of wild horses. Can she do so, or will she be caught up in the flames?

Pru, Abigail, and Lucky go to the Farmbrook Arena, the home of the Buffalo Hills Riding Competition, a horse show. Pru is excited to do some freestyle dressage for the first time, but when Rose Pendleton and her posse doubt Pru's abilities to win, Lucky comes to Pru's defense. Later, Lucky tries to make Pru feel better and thinks that Rose is trying to intimidate Pru in an attempt to get to drop out of the competition.

Lucky, Jim, and Kate return home with Polly, with Lucky happily telling her new baby sister she'll be living with them. Next, it cuts to Jim and Kate exhausted by caring for Polly, with Lucky helping them out. Seeing how her parents look, Lucky poses the idea of babysitting her young sister, and Jim accepts this, conditioned on Kate's approval.

Lucky, Abigail, and Pru ride to the schoolhouse and are surprised to see Aunt Cora as the substitute teacher. Lucky isn't sure about this and Aunt Cora says it will be ok, but it ends up being utter pandemonium. Later, while Pru and Abigail are content with having someone to choose for career day, Lucky is unsure which one to choose, either a charra, astronomer, or something new entirely. As a result, Lucky tries to balance all her interests and find out what job would be right for her.

The PALs go to a big interview in the city, as does Maricela and Aunt Cora, which will determine whether they get into Tides Run Academy or not. But later, Lucky accidentally creates a bad first impression with Madame Gummery, head of the academy, causing her to get nervous. Can she repair the damage she has done, or will it be permanent?

Lucky, Pru, and Abigail go through the city, searching for Spirit, who is disoriented. They find Spirit, but Lucky is worried about him and if he will go with her to the academy, or not. But, what will Spirit decide...will he go with her...or go on his own?

Lucky sings a song "Unstoppable" alongside Pru and Abigail in a music video.

The PALs are filling out forms for a summer jubilee, with Pru annoyed by the paperwork, Lucky unsure of when Spirit's birthday is, and Abigail not knowing her address. Jim later tells Lucky about a secret apple orchard in an attempt to make Spirit happy.

The PALs find out that Snips traded their camping equipment for a lollipop, to the twins, Mary Pat and Bianca.

The PALs devise a plan to get their camping equipment back, with Abigail and Pru each proposing their own plans.

When the PALs find out that Maricela purchased the last tent, they are not thrilled. They agree, begrudgingly, to help Maricela learn how to ride a horse and be in the Frontier Fillies.

Lucky goes riding across the frontier on Spirit in a music video for the song "Young & Free," where she is joined by Pru and Abigail on their respective horses.

The PALs prepare themselves for the talent show at the Jubilee. They meet another group of other girls, known as the BUDs, who introduced themselves and help acclimate them to the outdoor jubilee camp.

The BUDs begin their plan to sabotage the PALs. Lucky is suspicious, knowing she heard something in the night, and while Pru and Abigail aren't sure at first, they realize she is right. They later join the race, even though they have been sabotaged with cooking grease in their boots.

On the ride back to Miradero, the PALs get lost and use the skills they learned at the jubilee to try and get back. They get help from Mixtli when Boomerang is bitten by a snake.

The PALs have done extensive research of riding academies and send a letter to the one that suits them. Meanwhile, Maricela gets a new poodle and the PALs are entranced by a horse with a golden color.

The PALs chase down Governor on their horses and save him from falling down a ledge, and deal with him being more mischievous than usual. Later, Jim tells Mr. Granger and the PALs that a mountain lion has been spotted again, and the girls first recruit Snips to help break in Governor.

Jim, Kate, Aunt Cora, and Lucky play with Polly, and Lucky receives a letter from Palomino Bluffs Riding Academy, which informs her she got into the academy, causing her to be jubilant. She encounters Pru and Abigail who are also excited they got into the academy. Later, Abigail tries to teach Snips to read and write, while Lucky plans a huge festival as something for Pru and Abigail, so they don't feel like they are missing out on something, a festival which keeps getting more complex as she gathers supplies across the town.

The PALS ride to Palomino Bluffs Riding Academy and they meet the headmaster. They go to their dorms and Lucky learns she has been the talk of the school for weeks, called the "Girl With the Wild Horse." Later, they visit their dorm room, with Abigail and Lucky thinking of ways to make a good first impression, while Pru tries to figure out the most efficient route to go to her classes and impress the headmaster.

The PALs prepare themselves for class the following day, and are making more friends at the academy until the BUDs make a reappearance. They agreed to stay out of each other's way. Abigail volunteers to be a stable-wrangler volunteer, and when Headmaster Perkins says that a representative for Canter House needs to be elected, Bebe and Alex Fox. Later, Alex gives Lucky an idea: that she should run the election against Bebe. However, the race turns out to not be what Lucky, not Bebe expected, as Alex has one trick up his sleeve to try and win.

Pru practices for a dressage and is cheered on by Lucky and Abigail. Later, Pru is impressed by Priya and Sahir Kapoor who are some of the best dressage riders. When Lucky declares she will plan a social event at the Canter House, Pru and Abigail are worried. Pru worries about her ability at dressage when she can't make a high jump like Priya and Sahir, and the amount of training she is doing makes Lucky and Abigail very concerned.

The PALs walk across the Palomino Bluffs Riding Academy campus to their first class with Dr. Cope, the on-site veterinarian, following her, as does the rest of the class, to the beach, where they look at tide pools. When Abigail meets an otter, Dr. Cope warns her to not let the animal establish contact with humans and wants to have the animal sent to the zoo, with Abigail growing concerned. Meanwhile, Lucky tries to take an official PALs photo for her memory book.

As Lucky prepares for her dad's arrival at school and Pru complains about one of the photos, Bebe says that the room has to be very clean, and Abigail tells them about her hard wrangler shift. The PALs are uneasy when Maricela and her horse come to campus for family weekend, when all the families of the students come to visit. When it turns out that Lucky's dad is old friends with Bebe's dad, they have to pretend to best friends.

Lucky and Maricela observe the budding romance between Spirit and Mystery early in the morning, with Pru and Abigail going their separate ways. While Maricela wants to spend the "day with family," Lucky leaves to go to her first day of racing practice. When Lucky comes late, the instructor is not impressed and she tries to do what she can to get in her good graces, despite Jack's recommendation of her.

As Maricela adjusts to her life at Palamino Bluffs, she is encouraged by Pru, Abigail, and Lucky to make friends, after they are annoyed by her antics, following a visit to a foghorn house. She later starts to become friends with Sahir, Priya, and Alex, forming what she calls the "Poshy Posse"

Abigail realizes something, with Pru and Lucky surprised. One day earlier, Bebe, at a meeting of the foals, celebrates her first year as their representative, and asks for ideas for an upcoming dance. Alex threatens to throw her gavel in the ocean. Later, Bebe finds her gavel missing, and discovers it somewhere near a smashed window, with Alex blamed for this happening. But, did he actually do it?

Lucky confides in Jack that she is nervous about getting a ranking position, the anchor, on the school's horse racing team. Lucky comes across Charles, the project for Ranch Management class that Pru and Abigail are trying to take care of. After Jack encourages Lucky, she believes she will get the ranking position, but a student named Eleanor Kimble moves to the position instead, annoying her. How will Lucky deal with this dilemma?

Maricela is brushing the mane of Mystery, and she tells the PALs that a lady should always have a proper date to dances. So, they decide to go together and without dates. Maricela tells them she sent a formal invitation to Turo for the dance. Later, Abigail and Lucky are concerned when Pru seems stressed after talking to Priya and Sahir, but are excited when she tells them she has a crush on Sahir, telling them to keep it a secret. When the PALs learn about the legend of Los Amores Muertos from Lyds, they are surprised and tell her they will be on the lookout for it. Abigail and Lucky try to do what they can to get Sahir and Pru to admit their feelings for each other.

The PALs travel back to Miradero due to the death of Lucky's grandfather, with Pru and Abigail unsure what to tell her. Lucky complains that the funeral of her grandfather felt impersonal. Later, Pru and Abigail talk to each about how it is hard for Lucky, with Abigail appreciating everything around her. Kate tells Lucky they are there for her, telling her she doesn't have to prove anything to anyone.

The PALs are riding on the beach near the riding academy, enjoying their last day as foals. Headmaster Perkins, at a school assembly, tells the students of the news: the school has formed a partnership with Barrel Gold Oil and Drilling Company, to drill for oil in Palomino Bluffs, which is rich in oil deposits. Mr. Daniels of the company says they will share profits with the school, while the headmaster hypes up possible school improvements. Lyds Sterling is skeptical, asks if the company has researched the effects of the oil drilling in the area, and Mr. Daniels defends the company's actions.

The PALs have returned to Miradero, with Abigail and Lucky telling Pru that she needs to tell her parents she wants to be a dressage champion rather than helping at the Ramada. Later, the PALs, Jim and Cora, travel to the childhood home, as part of their summer adventures.

Lucky is told by Jim that he, Cora, and Kate decided to sell the house, but Lucky says the house can still be fixed and repaired, and isn't a lost cause. Pru and Abigail see an upside to the house being sold, saying they can now do fun stuff together, but Lucky believes that her grandfather left her the house so she can do something with it.