Professor Poponof, an old scientist, has just discovered a truth serum. Amédée, a burglar who has been surprised in his apartment, will become the perfect guinea-pig for testing the prof's last find. And it works well. Too well in fact, for if Amédée tells the truth he tells it to everybody and...
Jacqueline took one of her friends to a place where tourists, informants, girls, pimps and Apaches rub shoulders. Her husband, who watches over her, after having corrected Julot and Frize, is considered an ace at the Bal des Terreurs. He thus finds the love of his wife.
