Marcel and Francis are busy people. Marcel owns a café and spend all his nights running from meetings to meetings with members from the high society... at least, that's what he say to his barman! Francis leaves his home, loving wife and adorable daughter, frequently to attend meetings and demonstration with customers. His boss trusts him so much that his agenda is always full... at least, that's what he say to his wife! In fact, Marcel and Francis' incomes come from their night job: thieves! Here at least, they are professional. Troubles arise when, during one robbery, they encounter a young, high-pitched voice, candid girl who takes the decision to become their associate in crime... for the fun!

Three little criminals get a tip for a great coup with lots of money in it. Unfortunately they lack the starting funds to buy the required welding torch. So they persuade their successful colleague Alphonse to join their team. But the well thought-out coup fails, and Alphonse is the only one of them who ends up in jail for several years. When he's released, he's out for revenge.

"Le Dabe" retired many years ago and now he lives in the Tropics where he owns stables and horses. He is a very rich man. He was the king of all money counterfeiters. He is contacted from Paris to organize a new job. He says no. But when he finds out the the currency that should be counterfeited is the Dutch florin, he accepts immediately. He retired after having counterfeited 100 florin notes just before the Queen Wilhelmina retired them from circulation. He flies to Paris. But the gang is not to be trusted, at least not all of them.