In Nazi-occupied Warsaw, German intelligence officer Major Grau begins investigating the murder of a prostitute who was also a secret intelligence agent. Grau's inquiries lead him to suspect three high-ranking Nazi generals: General Tanz, who has a history of violence and mental instability; General Kahlenberg, who is deeply involved in clandestine anti-Nazi activities; and General von Seidlitz-Gabler, a calculating and ambitious officer. Despite the tense wartime environment, Grau continues his investigation, determined to uncover the truth behind the brutal crime.

As the war progresses, the plot shifts to Paris where Grau is reassigned but still obsessed with solving the case. Tensions mount as evidence surfaces linking the death to one of the generals. With the city under siege and the Nazi regime crumbling, Major Grau navigates a treacherous landscape of military protocol and political corruption to bring the murderer to justice. The quest for truth becomes increasingly perilous as loyalties are tested and the true nature of power is revealed amidst the chaos of war.