Maurice Legrand, a cashier, is married to Adele, a woman who is a real danger to everyone. She is called "Lulu" by the man. He meets her by accident, and he becomes her husband because of this Lulu is just a streetwalker who is in love with her pimp, Dede. He thinks he's found love, but she's not. Because Dede needs money, she only accepts Legrand as long as he meets those needs.