What happens when a group of battle-hardened medieval warriors meets an army of Zombies? Attempting to concoct a cure for the plague, medieval alchemists have created a horde of deadly ghouls. Standing in their way is a band of English soldiers, stranded in France, bent on destroying them.

Young and fearless knight Sir William Faulkner and his friend Justin des Ferrers have fought across the battlefields of Flanders and France at the start of the Hundred Years War and gained the favour of English King Edward III.

When a traitor plots to undermine the king, William and Justin became embroiled in one of the most dastardly conspiracies of 14th Century Europe, which leads to an attack on William's estate and an assault on his wife.

Thirsting for revenge, Faulkner and his men ride with the army to the battle of Crecy, where he argues with Edward and is exiled. When he and his men are employed as mercenaries, they come across the vivimorts, the result of alchemist's attempts to cure the black death; a walking dead that create havoc and death among the people. There are worse mutations to come as the French king, Philip, uses the monsters as a weapon. England itself is in peril and the group of men must cross France in an attempt to stop the demonic multitude.