Gregory Sallust initiates a clandestine campaign to undermine the Nazi occupation of France following the fall of Paris. Sallust, a seasoned operative, navigates the shifting political landscape of Vichy France and occupied territories to dismantle German control. His objective is to coordinate resistance efforts and execute sabotage missions that cripple the Third Reich's infrastructure. Opposing him are the pervasive intelligence networks of the Gestapo and the logistical might of the German military. The narrative follows a linear progression, focusing on the tactical maneuvers required to survive and operate within hostile territory.

Readers often note the author's commitment to historical accuracy regarding the atmosphere of occupied France. Discussion frequently centers on the protagonist's calculated approach to warfare and the tension inherent in operating behind enemy lines. Critics highlight the pacing as consistent with mid-century thriller conventions, prioritizing tactical detail over internal monologue. The book is recognized for its portrayal of the early resistance movements and the logistical challenges faced by operatives during the Second World War.