After losing his fiancée to suicide, Itsuki Kisaragi devotes his life to saving others by patrolling the cliffs that claimed her. However, when a woman, Sayaka Usami, leaps and accidentally pulls him with her in a rescue attempt gone wrong, both awaken in a new world far different than their own. Now reincarnated with mysterious powers and thrust into a conflict far grander than themselves, they must decide the direction of their new life, all while still coming to grips with their old.