Rex and Saskia, a young couple in love, are on vacation. They stop at a busy service station and Saskia is abducted. After three years and no sign of Saskia, Rex begins receiving letters from the abductor.

Pivoine, a 13-year-old girl, tired of her parents' arguments, reluctantly goes on vacation with them. She takes advantage of an accident on the highway to run away from them and take her legs. She meets a young legionnaire, Rouquin, also on the run. Together and in complicity, they will flee, trying to escape the highway police, and will love each other without saying it...