The eight-person girls' dormitory seems calm on the surface, but in reality there is an undercurrent, which everyone knows but does not reveal, until one day... One of them makes a game pact with the devil, causing the entire dormitory and even the people around him to enter the game world, and thus fall into danger, fighting for survival step by step... The fog is thick, people's hearts are unpredictable, and where will the ending go...