Espion(s) plot
Gérard and Vincent work in the baggage department of a Paris airport and earn some extra money by stealing valuables from suitcases. When Gérard looks at an apparently harmless bottle of perfume, it explodes and he is fatally injured. His colleague Vincent is arrested and ends up in prison. There he is recruited by an agent for MI5. He does not have to serve his sentence when he shadows Peter Burton, a wealthy London pharmaceutical company, for the British secret service. Vincent even has to invade Burton's private life by seducing his French wife Claire.