Medieval England has fallen under the shadow of The Black Death. In this apocalyptic world, filled with fear and superstition, a young monk called Osmund is charged with leading a fearsome knight, Ulric (Sean Bean) and his group of mercenaries to a remote marsh. Their quest is to hunt down a necromancer - someone able to bring the dead back to life. Torn between his love of God and the love of a young woman, Osmund discovers the necromancer, a mysterious beauty called Langiva. After Langiva reveals her Satanic identity and offers Osmund his heart's desire, the horror of his real journey begins....