The plot is set in a post apocalyptic Junkyard where people take refuge from authority and are able to practice their fantasies and fetishes without being stopped by the police. These people are led by Emanou who is a sort of Messiah, who promises music rather than salvation.
Toby and his sister Liz live with their aunt and uncle, who take in Cambodian orphan Hoang while he awaits foster placement. The trio become fast friends, and, as they explore a nearby wood, encounter a retired engineer living in an abandoned freight car. Playing off Toby's already active imagination, the kids and the engineer use the train car to make a fantastic journey to Cambodia.
A murder is committed in the building where Aurélia Maudru, inspector of the judicial police in charge of the investigation, lives.
