In 1990, Deemantha is a young dancing teacher. He is diagnosed with lung cancer, shocking his mother, Maya, and adoptive father, Dharmapriya. Deemantha thinks that his late father, Gunendra has died from the same type of cancer. However, Dharmapriya informs him that Gunendra's death was not due to cancer and decides to tell him the story of Gunendra's life.
The story flashes back to 1958 when Gunendra and Dharmapriya were best friends. Gunendra is a rich businessman who is also able to play music. At a party, he is diagnosed with lung cancer. His doctor warns that Gunendra's life expectancy is a mere 3 months. Meanwhile, A man named Appuhami meets Dharmapriya to post an advertisement about an Ayurvedic doctor in rural village, Thalakiriagama, who cured cancer. Gunendra travels to the doctor, who cures him and advises him to stay away from alcohol. But, after returning, Gunendra continues to drink alcohol, to the dismay of his wife, Maya and Dharmapriya. As a result of this, He is diagnosed with cancer again after 2 years.
Gunendra returns to Thalakiriyagama and learns that the doctor had died before 6 months. He is shocked and tries to return but doctor's daughter, Mangali manages to cure him. Gunendra realizes that he has fallen in love with Mangali and marries her.
After some time, Gunendra returns and lives with Maya who is pregnant now. From Appuhami, Dharmapriya finds out that Mangali is also pregnant with Gunendra's child. He gets angry and informs Gunendra, who later visits Mangali. Mangali advises him to keep his marriage with Maya. Gunendra commits suicide at a beach and Dharmapriya takes Maya's responsibility. After that, both Maya and Mangali give birth to boys. Maya names her child Deemantha. The past story ends after that.
The day after hearing the story, a shocked Deemantha visits Thalakiriyagama with his mother and uncle. Mangali is now grown old and lives with her son. She sees Dharmapriya, Maya, and Deemantha and is amazed. Finally, she tells her son that his relatives have come.
