Sara, head of the narcotics squad of the Toulouse police, investigates a go-fast between Spain and France, in which her former lover, Raynal, is infiltrated. She quickly discovers that her case is linked to the murder of two teenagers in a Parisian hospital, which Richard, the head of the local criminal police, is in charge of. Forced to work together to find the murderer and stop the go-fast, Sara and Richard find themselves thrust into a breathless race against time on the roads of Spain and France as their attraction for each other grows.
