USA: Valiant Motors hires a bright young mechanic, unaware that he's secretly working as a spy for Team Leader. When he manages to break into the Valiant plant and steal valuable plans for a new kind of engine, Michael must pursue him across treacherous mountain roads!
DE: Quincy has developed a new engine, beat by a mile with the Vaillant in a test race, the team leader. Shortly thereafter presents Pops a new driver named David Desmond. Stealing the secret plans of the engine and makes with them from the dust ... (information from the German series "Michel Vaillant")
