Féminin masculine

Landry and Sylvinet are identical twins who are distraught when they are separated at the age of fourteen. Sent to work on the neighboring farm because phylloxera has ruined his father's vines, Sylvain, the stronger of the two brothers, recovers from the shock but not Sylvinet, who keeps moaning and sulking. Caillaud, the rich farmer who employs Landry is pleased with the way Landry works and lets him woo his daughter Madelon. Some day, due to a misunderstanding between the twins, Sylvinet runs away from home and disappears in the forest. And while Landry tries to find him in the woods he is helped by a little savage, Fadette, who lives there with her spiteful grandmother and her mentally retarded brother. Against all odds, Landry will gradually for this dirty little wild child.

The Cordier fight in family against the crime: the father is police captain, the son, investigating judge and the girl, a journalist.