After making a serious mistake in his work in Tokyo, talented surgeon Goto Kensuke is invited to take charge of the only clinic on the small island of Yonaguni, Okinawa. It is difficult to get competent doctors to serve on this remote island, and the islanders are now used to traveling for hours via boat for proper medical care. Despite seeming weak and unreliable (he gets very seasick, and does not have a driving license), he wins over the skeptical islanders with his skill and dedication. Some children of the island make a flag for his clinic, but get his name wrong. Thereafter he is known by all as Koto.