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...
Escaping from a policeman who has caught h.im with a stolen dog, Toto (Albert Préjean), a petty crook, hides in the apartment of a typist, Ginette (Renée Saint-Cyr). The two quickly fall in love, and after a brief incarceration, Toto returns to her and schemes to have her win a beauty contest.
Under two different names, a journalist writes for two newspapers with opposing political doctrines and finds himself forced to fight a duel with himself.
Bernard, Sleeper Coach conductor and automobile inventor, is confused to be the racing car company president, and falls in love with a countess, who is actually a slogan prize winner chorine.
In Vendée, an old farmer is gradually abandoned by his family who do not see their future in the fields. Only a cripple in love and abandoned remain at his side.
The widow of a soldier in the 1914-1918 war, running an inn called "Au rendez-vous des veterans", is happy to see her daughter in love with an officer whose father was once in love with La Madelon.
A widow named Blanche Montel endeavours to find a man with whom to produce a child so that she can pretend that the child was her late husband's and so inherit a fortune.
Jacques de Nisson, a rich man, has a new mistress, Lucie Cavelier. Which does not prevent him from courting Florence, the wife of his lawyer friend Forestier. One day, Jacques is found murdered and chief-inspector Candély is sent on the spot to investigate. Jean, the victim's butler, Lucie as well...
Count Dimitri is sentenced to death for hitting Prince Paul who was trying to steal a kiss from Countess Vera. Prince Paul pardons him because of a young girl who knew how to conquer his heart at the right time.
The son of a ruined family transforms into a castellan following an inheritance, becomes a parachutist champion in spite of himself, and becomes famous.
A woman's marriage is on the rocks ; to avenge herself, she decides to take a lover for one night .So she buys all his stock from a balloon man and flies them through the Parisian sky ; all her balloons carry a message :"I will be alone after midnight" (hence the title); a lot a suitors comme to...
Démonio the fakir has impressed a rich but weak-willed young man who hires him as an energy teacher. Demonio drags out the businesses of the shy lover, but his partner arranges everything and the finally satisfied lover endows the two accomplices who renounce fakirism.
After a year of turbulent marriage Annette and Daniel get a divorce, and each marries again. However, they meet again on the French Riviera and are tempted to give in to their old passion...