Usually cast as secret agent/private eye Lemmy Caution, Eddie Constantine plays "Eddie" in The Empire of Night. This time, Constantine is a cabaret singer at odds with a criminal gang. When the villains try to take over every nightclub in town for their own nefarious purposes, Eddie sings a new tune with his fists. The story takes several unexpected turns, but Constantine remains in charge throughout.

The action begins in black and white, like a memory. Klaus is a Nazi military who has just failed an attempt on Hitler. Desperate, Klaus shoots and kills his children and then shoots at his pregnant wife and leaves her badly injured. Finally, attempts suicide, but at the last moment does not have the courage to pull the trigger, and flees on a motorcycle, having an accident ... The action continues in France. Jean-Claude is a handsome young man self-conscious about a malformation in his face. Jean-Claude lives with his parents, Jacques Bergé, an amnesiac man, self-enclosed and obsessed with Egyptian art, and Concepcion, a woman also closed in herself and obsessed with flowers from her garden, and apparently , suffering from paranoia.

In Venice, forty-old-year old Serge Fabergé has just been given the best advertisement director award. While taking a walk on the Piazza San Marco, Serge meets Evelyn Nicholson, a twenty-three-year-old English beauty. He falls passionately in love with her and, as a result, starts neglecting his charming wife, Françoise, going so far as to consider divorcing her. But having a young fiery insatiable mistress is not without drawbacks