After a successful robbery, the Olsen Gang is living the good life on a luxury yacht in Monaco. But someone still hasn’t given up catching them…

The gang resides on a luxury yacht in Monte Carlo, Monaco. They live a rich life and all is well until their old friend, Biffen, appears under their yacht with diving equipment. He climbs aboard while everyone is down in the cabin and steals the suitcase containing the money. When Egon is about to pay for some luxury items, he discovers that the money is gone and he can’t pay…