During the time of the bubonic plague in 14th-century England, young monk Osmund (Eddie Redmayne) is recruited by the knight Ulric (Sean Bean) to lead a group of soldiers through the marshes into a mysterious village, where rumors are spreading that a necromancer is raising plague victims from the dead. Osmund agrees, but he has an ulterior motive--to find Averill (Kimberley Nixon), a young woman who has gone missing. Along the way, the group encounters unimagined darkness.