An Arabic racketeer by the name of Ali-Gusa-No has sold a worthless piece of desert land to a group of ten gullible men for a hefty sum of money.
Recently, however, a rich depot of uranium was discovered on this very land, making its owners potential multi-millionaires.
catches wind of this lucrative objective and begins sending out its own agents to collect the contract pieces and silence their owners forever.
Despite taking extreme precautions, Mortadelo and Filemon always accidentally reveal the names and current locations of the contract owners to their enemy counterparts, resulting in furious chases all around the world to protect the unwitting subjects in question: A mountain climber, a big game hunter, a sailor, a construction worker, a cave explorer, an Egyptologist, a farmer, an animal lover with a taste for exotic pets, a pyrotechnician... and as a final twist, Filemón himself.
As soon as Filemón becomes known as the final participant in Ali-Gusa-No's shady deal, he gets a number of unpleasant house calls by A.B.U.E.L.A.