On the desolate battlefields of northern France, the guns of the Great War are silent. Special battalions now face the dangerous task of gathering up the dead for mass burial.

Captain Mackenzie is a survivor of the war, but still its prisoner. He cannot return home until his fallen comrades are recovered and laid to rest. His task is upended when a gruesome discovery is made beneath the ruins of a German strongpoint. Amy Vanneck's fiancé is one soldier lost amongst many, but she cannot accept that his body may never be found. Defying convention, hardship, and impossible odds, she heads to France, determined to discover what became of the man she loved.

It soon becomes clear that what Mackenzie has uncovered is a war crime of inhuman savagery. As the truth leaches out, both he and Amy are drawn into the hunt for a psychopath, one for whom the atrocity at Two Storm Wood is not an end, but a beginning.