Michel and Claire are facing a miserable vacation. Driving through a heat wave in their beat up car with their three screaming daughters in the back seat make the trip to their farmhouse all the more challenging. In addition, Miche's overbearing parents will be joining them. At a road-stop, the run into Harry, a slightly off-kilter wealthy man who claims to have known Michel in high school. Influenced by Harry's perserverance and a ride in his air-conditioned Mercedes, Michel and Claire find themselves inviting Harry along on their vacation. But soon enough, Harry's motives become suspect as one strange episode after another begins to change Michel's life...