Thomas, in his forties, holds an important post in a slaughterhouse. He is engaged to Marie-Rose, the daughter of the director, whom he hopes to follow later. In a routine examination in the hospital, however, he finds out that he has cancer and his days are counted. The upheaval that he suffers as a result, however, does not take long, his decision is certain: he will use the short time to clean up some bad guys. What else can he do now?

A safecracker turns double agent during WWII.

Sophie Mallet is the lively manager of a detective agency, assisted by Emile Gachit, her conscientious but not very effective right-hand man. One day a fellow named David entrusts her a pack of cigarettes that she is supposed to hand over to a certain John Smith. But David soon disappears while John Smith is murdered. Moreover, a lot of dubious characters prove "very interested" in the pack of cigarettes... Which will keep Sophie and Emile for some time...!