After the discovery of two murders, Commissioner Chabrier, of the French secret services, is investigating the disappearance of plans affecting the national defense of the country robbed by a gang of international spies.
The Count of Kerlor, to chastise his wife whom he believes to be unfaithful, entrusts his son to a couple of scoundrels. When he repents and wants to find the child, the carnies make their nephew sick. But the other little boy, in search of his comrade, is recognized by his reconciled parents.
Lieutenant Varnière, responsible for discovering the cause of the death of two officers in Algeria, unmasks the assassin in the person of a Russian who lives with three women. He falls in love with one of them and runs away with her while the Russian is killed by a devoted servant.
