With the help of journalist Diane Castelain, Parisian police inspectors Leo Gorce and Gu Arenas are trying to solve the murder of a member of the French Parliament, but some dangerous powerful people try to make sure that doesn't happen.
In Paris, two cops are competing for the vacant job of chief of police, in the middle of the search for a gang of violent thieves. The movie is directed by Olivier Marchal, a former police officer who spent 12 years with the French police before creating this story, taken in part from real events of the 1980s.
After going to extremes to cover up an accident, a corrupt cop's life spirals out of control when he starts receiving threats from a mysterious witness.