Pierre (Charles Berling) and Benoit (Yvan Attal) and have been the worlds best friends for 20 years. For 20 years, Pierre has been exploiting his charm, wackiness, cheek and genuine ability to please; for 20 years Benoit has been working hard at his life, paying for his friend, quietly waiting for love to hit him, wanting whats sensible. Marie (Charlotte Gainsbourg) is shy, or rather discreet, and thinks she knows what she wants. She is looking for a Benoit but marries Pierre. How do you take the news that your best friend is madly in love with your wife? How do you go from a couple of friends, to a loving couple, to an infernal triangle?