A woman, concerned by her husband's eccentric behavior, hires a detective to follow his every move -- which yields unexpected results.

The final installment in director Lucas Belvaux's trilogy follows Pascal, a cop who sees a return to credibility in the capture of escaped convict Bruno--who in turn is harbored by Pascal's morphine-addicted wife Agnes. Pascal's already precarious ties to Agnes are strained further when he meets and falls for her fellow schoolteacher friend Cecile. With Pascal focused on Bruno and Cecile, Agnes is forced to find a fix on her own.

Après quinze ans passés derrière les barreaux, Bruno, qui prône la révolution prolétarienne, s'évade. Ce dernier veut continuer la lutte, faire sortir ses camarades de prison, libérer les masses du joug capitaliste. Tous ses anciens alliés n'y croient plus, même Jeanne qui s'est mariée et a maintenant des enfants.