Season 1

The story follows a brain surgeon named Jin Minakata who has spent the last two years in anguish, as his fiancee, Miki, herself a doctor, lies in a vegetative state after an operation he performed. One day, he is knocked unconscious by a panicking patient at the hospital and awakens to find himself transported back in time to the Edo period. He is soon attacked by a samurai, but he escapes with the help of a man named Kyōtarō Tachibana. Kyōtarō suffers a serious injury to the head while trying to protect him, but Jin manages to save his life despite a lack of proper medical equipment. Because of that, Kyōtarō's sister Saki begins taking an interest in Jin and becomes his assistant. Meanwhile, Jin is determined to find a way back to the present.

Season 2

Two years have passed since the last season. Jin and Saki develop a sweet confectionery that contains medicine for Saki's mother who has a severe case of beriberi. Meanwhile, Ryoma asks Jin to care for Kaishuu Katsu's mentor, Shozan Sakuma. Shōzan is in a critical state after being attacked by the Shinsengumi. Jin is reluctant because curing Shozan would mean changing the course of history. However, Shōzan tells him that he too is involved in the “present”.

Jin 1

Jin 2