ISLAND follows an amnesiac protagonist, given the name Setsuna Sanzenkai, who washes up on the shores of an isolated island called Urashima, knowing nothing but that he has some kind of mission to fulfill. He meets and is taken in by the reclusive Rinne Ohara, the daughter of one of the island’s formerly influential Three Families. He meets the daughters of the other families: the rebellious Karen Kurutsu, who wants to escape from the island to the mainland; and Sara Garando, the young shrine maiden who believes it’s her destiny to save the island. Convinced he traveled to the year 1999 (in which the game is set), Setsuna sets off to remember his mission, and to find an identity for himself there on that secluded island.