A family hires a babysitter who seems to possess magical powers.

Five middle-aged men already converged in one platoon - people of different professions and different social status are called up as privates for three-month reserve training...

based on the play by French playwright Louis Völl. A writer who wants to see and display the life of an ordinary bourgeois settles in the house. Having learned about the true goals of the guest, the family members decide to play a prank on him, making him believe that a gang of crooks and gangsters is hiding in the depths of the "quiet family".