Remote and neglected, Black Lake has been closed for years. Johan invites his friends thereon a test trip, with the idea of reopening the resort. They are soon gripped by a series of disturbing experiences. On the very first night, Johan's girlfriend, Hanne, is woken by a sickening thudding noise coming from the cellar. The landlord refuses to let them investigate. It turns out the resort was closed after a family were found dead, strangled. One by one, members of the group wake with bloodshot eyes following nightmares of being strangled. With fear and danger spiralling, Hanne becomes convinced that supernatural forces wish them ill. Who can be trusted? Who will survive?