Young monk Osmund (Eddie Redmayne) is in charge of guiding the formidable knight Ulrich (Sean Bean) and his group of men to an isolated marshy village. Their mission is to get hold of a necromancer, who is said to be capable of bringing the deceased back to life. After a trip overwhelmed with disturbing snags, Ulric's emissary locates the village. It is an uncanny place ruled by a pretty witch named Langiva (Carice van Houten). When she offers Osmund his heart's longing, he is required to decide between his faith and the secrets that the village has in store.