Medieval England has fallen under the shadow of the Black Death. In this apocalyptic world filled with fear and superstition, a fearsome knight, and his band of mercenaries seek out a young monk, Osmund, to lead them through the black marshes. Their quest is to hunt down a necromancer, Langiva, rumoured to be able to breathe life into the dead. But after Langiva reveals her true Satanic identity and offers Osmund his heart's desire, the horror of his real journey begins…