Three scientists have chosen Fumé and Grisu to search for the traces of the Naftans, the natives of the desert empire, in the realm of Emir El Tapin. During the excavations, the dragons discover an oil well. El Tapin is now rich, and soon there are people who want to sell him something - one is a gangster with whom the little dragon has to fight terribly. As soon as this adventure is over, a new danger lurks back home in Scotland: a lorry carrying Sir Cedric and Grisu crashes into an ice cave during a snowstorm. Now the fiery Fumé saves the two.