As the first test drives begin for the 24 Hours of Le Mans, the body of a pilot is discovered on the track. It was carefully dragged there. Captain Sabrina Nedjard is in charge of the investigation, followed by an American observer from LAPD as part of an international exchange. Their inquiries will lead them to the paddocks and the workshops of a well-known amateur racing team where high stakes disrupt the relationships between an authoritarian father and his children.
Annie lives in harmony with her husband Laurent and her children: the sensitive elders Maximilien and César; the younger Antoine whom Poupi, never-complaining teen, helps raising him. But a positive pregnancy test will disturb the harmony.