L’Agence O is a famous Parisian private detective firm. Its premises are located in the Passage Choiseul. In front, Torrence leads the shop. In fact, the agency's team is complemented by Émilie le Roux, Mademoiselle Berthe and Barbet, who scrutinize clients through a one-way mirror located behind the desk. Getting hold of a man disguised as an old lady, solving the mystery of the Prisoner of Lagny...

Film produced by Radio Canada, Quebec.

After she had been raped by her father, a young woman leaves the town with her new born son. Years later, the son can't accept that his mother fell in love with someone else than the mythical father she had told him about.

Industrial pollution causes water poisoning and generalized sickness in a nearby city and is the start of a major news scandal.