The brave Monsieur Breloque has a friend, Pierre Martel, a private detective. When the latter asks him to replace him for a while, Breloque, although having no competence in the matter, accepts. He anticipates adventures and misadventures but also happy surprises.
A baby is abandoned near the Neva in St. Petersburg 1890. A teacher picks it up and takes the little girl. 20 years pass, Masha (Claudia Victrix) flee Russia because her father conspired against the Tsarist regime and is in the attention of the dangerous General Bourgassoff (Jean Toulout) . She goes to study medicine in Paris....
