Land of Black Gold

One fine sunny morning, the Thompsons have taken their car for a drive. They stop to refill at a petrol pump and get a drop of petrol in their pocket cigarette lighter too. They drive away, chanting happily to a tune, when suddenly, the car's engine bursts with a loud bang. Apparently it seems to be a fault with the car. The Thompsons dial Autocart to repair their car and settle for a smoke. As they try to light their cigarettes, the lighter too bursts. It becomes evident that there is something wrong with the petrol. The next day, Tintin reads the news papers about the petrol disasters. He fears a war will take place, if the malady goes unchecked. Suddenly, Haddock rings up and says that he is leaving on an assignment. The Thompsons come in and discuss about the matter with Tintin. They put the blame on Autocart, saying that it being a vehicle repair company, might be adulterating the petrol for their own profits. They plan to work for Autocart and gain information from inside. Next day, the Thompsons apply as drivers and take jobs inside Autocart. The first day, they mess up and bungle their ride. The next day, they get inattentive while pressurizing a tyre and burst it. Immediately, they are thrown out of the company. Menawhile, tintin tries to get information about petrol sales. He sees that petrol sales have reduced drastically. The laboratories try in vain to decipher the harmful contents of the petrol. That night, Tintin hears some suspicious conversations at the sh