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.

• Les Établissements Braunberger-Richebé
• Abel Tarride
• Rosine Deréan
• Rolla Norman
• Robert Le Vigan
• Jacques Henley
• Anthony Gildès
• Robert Lepers
• Jean Gobet