Olivier, the nine-year-old son of Elisabeth and Serge, a country veterinarian, vanishes one afternoon on the way to his grandmother's house. The emotional aftermath of his disappearance sends his father packing and nearly destroys his mother.

François Cluzet
as Serge Duval

Grégoire Colin
as Olivier

Marina Golovine
as Nadine

Brigitte Roüan
as Elisabeth Duval

Frédéric Quiring
as Marcel

Emmanuel Morozof
as Olivier petite

Faye Gatteau
as Nadine petite

Carole Lemerle
as Babette petite

Jean-François Stévenin
as l'inspecteur Druot

Jean-Bernard Josko
as Le flic