Crossed Tracks (2007)

Bestselling novelist Judith Ralitzer is questioned by police regarding the vanishing of her ghostwriter. Simultaneously, a serial killer escapes from a Paris prison. A schoolteacher abandons his wife and children. Stranded at a gas station by her fiancé, Paul, on the way to her family's farm, a stressed hairdresser named Hughette is offered a ride by a mysterious stranger. Desperate not to disappoint her mother, she asks him to impersonate Paul for 24 hours. Who is this enigmatic man, and can Hughette distinguish between reality and illusion?