Synopsis: Georges received a very easy plan to get a 72-carat jewel. He asks Ben to organize the robbery. The latter teamed up with two other professionals, Jo and Karl. They had just left the jeweller's house, when the embarrassment begins. Ben tries to understand, but can make nothing of the problem: our three robbers are arrested an hour later by the local mafia, and it is discovered that the diamond is fake. We then relive the robbery through the eyes of the other two robbers. In every version, the diamond always ends up being fake, in a manner that is inexplicable! A series of absurd situations await these amateurs who are not on the same page. Furthermore, our three friends are very far from being expert thieves that they claim to be.