Drawing inspiration from both Lord of the Flies and Battle Royale, this story follows Sei, a young Japanese man who is transported to the remote and mysterious Suicide Island following a failed suicide attempt. There, he faces the grim choice of living out his remaining days or finding a way to die. As society abandons many of its suicidal citizens, the island becomes populated by haunted, driven characters who frequently clash with one another and sometimes struggle to maintain their sanity.