Cashier Maurice Legrand is married to Adele, a terror. By chance, he meets Lucienne, "Lulu", and make her his mistress. He thinks he finally met love, but Lulu is nothing but a streetwalker, in love with Dede, her pimp. She only accepts Legrand to satisfy Dede's needs of money.
A one-night stand with an entertainer threatens to destroy a woman's marriage after she gives birth to a black child.
A poor boy lives in the attic of a luxury house. During a party, he pays court to an elegant young woman who, without warning him, surprises him at his home.
The Marquise de Langrune invites her friends at her castle in Beaulieu. Among them is Lord Beltham who also came to bring her a significant sum of money. The mysterious Fantômas kills the Marquise during the night. Inspector Juve is sent on his trail.
The new French military attaché at the Constantinople embassy helps a young woman being blackmailed by her own husband.
Maigret investigates in Concarneau where the passage of a yellow dog accompanies a series of murders, sowing terror in the population. The police seem helpless. It must be said that it has no significant evidence.
To protect the honor of a married lady, a grammar professor pretends to be a singing teacher and falls in love with the real professor's daughter.
A bank employee who stole money at work falls in the hands of a dangerous escaped convict whose girlfriend is going to help him out of this mess.
A lieutenant of the French navy, ready to kill himself in despair, renounces his project after spending a night with a beautiful stranger, the Princess of Lystrie.
