A trip to Africa turns into an unusual kind of safari for our reporter friends. Spirou and Fantasio, during a daring night investigation, encounter a wounded man who is running from mysterious men. He claims they bombed an automobile factory to steal the plans of a highly advanced prototype, and that he took half of the plans and ran. Having sworn to take the documents back to their owner who has the other half the two adventurers are soon on their way to Africa. But of course, the bandits are in hot pursuit "