Lillian's twin brother Bjørn dies a mysterious death alone at the old family cabin. Now, one year later, Lillian and her friends arrive at the old cabin to say their goodbyes, and shortly thereafter, gruesome and mysterious events start to follow. As the lines between reality and Lillian's nightmares get blurred, and one from the group ends up dead, she has to fight both an external and internal struggle to stay alive. Is old folklore becoming reality, or is the enemy actually within themselves?