Two mismatched cops team up to investigate the murder of a business mogul's wife.

The first part of a documentary made by Bertrand and Nils Tavernier, following a letter judged provocative by the Minister of Integration at the time, who spent several months in the Grands Pêchers housing estate in Montreuil, giving voice to its inhabitants. The problems of unemployment, racism, integration and delinquency are addressed.

Ousmane Diakité and François Monge are two cops with very different styles, backgrounds and careers. The unlikely pair are reunited once again for a new investigation that takes them across France. What seemed to be a simple drug deal turns out to be a much bigger criminal case wrapped in danger and unexpected comedy.