Aikawa Subaro, recent inhabitant of the lonely and remote island of Mikotojima, works as a clerk for the sole medical clinic on the island. The Director of the clinic, having taken a liking to Subaro, has been training him to give medical treatments. But as an unlicensed practitioner, what Subaro has been reluctantly doing is illegal. Still, with only one doctor on the island, not many are putting up a fuss. Just as Subaro begins a tentative relationship with the nurse Suzuki Akiko, another Akiko arrives on the island. Tasaka Akiko arrives by ship with several of her friends but seems distant and troubled; a sign Subaro quickly picks up on. But now that an emergency has come up and the sole doctor is gone, Subaro may have to prove his mettle sooner than expected.