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.
as le commissaire Maigret
as Emma
as Léon
as le docteur Ernest Michoux
as le Pommeret
as Le pharmacien
as L'inspecteur
as Le voyageur de commerce
as Le marin
as Le maire
as Servières
as L'hôtelière
