Liam Stone is a quiet man whose personal life has taken a turn for the worse. Going through a devastating divorce, he flies to Sweden for a short vacation with old college friends. A time of relaxation and enjoyment is just what he needs to brighten his flagging spirits and recover from a traumatic breakup.

But when Liam and his friends make a daytrip to an isolated and beautiful island, they quickly find something is horribly wrong with the locals. What began as a carefree historical excursion soon becomes a battle for survival, forcing the companions to flee for their lives from ancient creatures intent on hunting them for food.

Facing a cunning and merciless enemy, their only path to freedom means cooperating with a local ally. But as their numbers decrease and chances for escape fade, the frantic party finds that only a painful and unspeakable choice offers any real hope for making it home alive.