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.

The new French military attaché at the Constantinople embassy helps a young woman being blackmailed by her own husband.

Adémaï is forcibly engaged to the farmer's daughter. He tries in vain to get rid of it and, weary of the struggle, flees in a plane with his comrade Michelet whom he believes to be an instructor. For three days and three nights, the unfortunates turn in a closed circuit, thus beating the world record.

Perrichon, a well-off self-satisfied bourgeois, goes on holiday with his wife and his pretty daughter Henriette. He is more or less willingly followed by two young men, Armand Desroches et Daniel Savary, who both have fallen in love with Henriette after meeting her at a ball. The Perrichons's vacation will be eventful with, among other misadventures, two accidents (one real, the other fake) and the threat of a duel.

Étienne, a very sensitive being, watches helplessly as his mother suffers from his father's infidelities. He tries to seduce his father's next conquest without his knowledge.

Having fallen madly in love with the daughter of a prison guard, Guignolet climbs the wall to free her. He falls into this prison yard where he ends up being a prisoner in the heart of the delicious daughter of the guard.

In his will, the late Jérôme Armandy has expressed the wish to have all the surviving members of his family summoned to the Château de l'Etang, in Provence. Firmin, Jérôme's servant, asks Claude, a Montmartre artist, to organize the reunion, to find the sum of 17 million francs which is hidden there (as a child he had been told by Armandy where the hiding place was) and to divide the amount between the different heirs. But a series of odd facts occur: Claude is knocked unconscious as he is busy opening the hiding place door; one of the heirs gets killed; and even more astounding, the dead man reappears and... asks his money back!

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.