Sinkhole

An ordinary office worker Dong-won and his family invites his colleagues to a housewarming party in his new house. But a heavy overnight rain leads to a gigantic sinkhole, which swallows up the entire apartment and the people inside. Hundreds of meters down the hole, Dong-won, his neighbor Man-su, and the unfortunate housewarming party guests must find their way out before the rainwater fills the hole and drowns everyone in it.