Hugo-Paul de Weydroos, forger who manages to mystify the most renowned experts, is an attractive man, not without talent but paranoid and megalomaniac. He lived a childhood in the Paris of the 1920s, upset by his love of drawing and painting thwarted by an abusive mother. Delivered to his own fantasies, the hero indulges in the most disordered introspection and will end up consuming himself to become the reincarnation of the one he is trying to copy: Hans Pauli Weyergans, painter of the 18th century.

Alyse, a successful cover girl, has had an affair with Luc Bordier, an advertising photographer, for one year now. But although Luc loves her truly, he tends to neglect her as he is too busy with his work. Chloé, who runs an advertising agency, takes advantage of these off-days to seduce Alyse. Alyse tries to hide the situation from Luc but the latter realizes what is happening. He urges Alyse to go with him on a trip to the West Indies but she refuses and joins Chloé, not without suffering from being separated from Luc...

A network of spies affects the lives of people in and out of the organization in this espionage drama. Dominique is the neglected wife of a spy who tracks him down at a Paris antique shop. Finding him with a female spy, the enraged wife shoots both of them. Dominique hides out on a boat while the police investigate the murders, and international spies scramble to recover some missing microfilm. Helen is the spy boss who orders a hit man to go after Dominique.