The landowners Tex is an avid racer. It is a matter of honor for him to sponsor the Grand Prix of Texas. He himself wants, of course, take part in the competition to which the Vaillant announced.As Southwestern Julie sees it falls in love with her and invites the Vaillants you to a barbeque on his ranch. Everyone is happy - only Steve pouting out of jealousy and prefer tinkering with the cars. When his colleagues late return in the evening, they find though the sleeping Steve before, but not the engine of Michels car! A feverish search begins. (information from the German series "Michel Vaillant")