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...
Two young delinquents run away from a reformatory, across France with a front-wheel drive (Citroën) and live on thefts made here and there in a very crazy way...the police are on their heels, love for one of them is on their way, but so is the drama.
Stéfanie, nursing an old man in a nice country villa, has been killed by young men; they will try to replace her with a double; when she finally gets suspicious they plan to kill her too
