A petty criminal aged 22, the attractive Yvette is caught after robbing a watchmaker's shop with a toy pistol and felling his old wife. To defend her, she asks for André Gobillot, a leading member of the Paris bar. Telling him she has no money to pay him, she lifts her skirt to show him her goods. Accepting the deal, he arranges a false witness and after getting her acquitted instals her in a small hotel.