A comedy about friendship that has many surprises in store for us! How can we find the perfect friend? By connecting to Amitic, the friendly version of Meetic. Pierre, a snobbish Parisian banker, one day sees Serge Brown who claims to be... his best friend! Contrary to all evidence, their friendly compatibility reaches 100% according to the computer program! Brown then turns into a real ball, ready to do anything to live this unexpected friendship, leaves to blackmail Pierre. The latter is not helped in this ordeal by his wife Martine, totally seduced by Marron and very happy with the prospect of a little weekend for three in Creuse.

A l'encontre de toute évidence, leur compatibilité amicale atteint les 100 % selon le programme informatique! Serge Marron se transforme alors en véritable boulet, prêt à tout pour vivre cette amitié inespérée, quitte à faire du chantage à Pierre. Ce dernier n'est pas aidé dans ce calvaire par sa femme Martine, totalement séduite par Marron et très heureuse de la perspective d'un petit weekend à trois dans la Creuse...