Much to the chagrin of the official police, members of the O Agency are crossing the legal line widely - and repeatedly - to prevent a saxophonist from being charged with murder. They manage - but with difficulty - to establish proof of the plot aimed at compromising the musician.

José is a saxophonist in a nightclub run by a manager nicknamed "The Banker". Kikou, the mistress of "The Banker" also works in this nightclub as a stripper and also prostitutes herself with large clients. José is attracted to Kikou and she is not insensitive to the young man. Having surprised them, "The Banker" decides to take revenge ...