Sosildo, an uninhabited island cursed by a god, is now uninhabited. A four-member occult club visits Sosildo for summer vacation, only to be attacked and killed by a mysterious monster. When they open their eyes, it's back to their first day on the island. The curse forces them to repeat the same day over and over again. To escape, they must find five objects on a map... Will they be able to escape safely? (Source: Kakaopage, translated)