A veteran bank robber enters into a tense battle of wills with his elderly mother after moving back home to maintain a low profile in this crime comedy from actordirector Albert Dupontel. In criminal circles, Sidney Thomas operates under the alias le Vilain. But after 20 decades of successful hold-ups, Sidney starts to feel like his luck is running out. Shortly after Sidney moves back in with his mother, Mrs. Thomas discovers exactly how her son has managed to make such a comfortable living, and determines to get her son walking the straight and narrow. Little does Mrs. Thomas realize how devoted Sidney is to his life of crime, and before long tensions in this quaint household have spiked to an all-time high.