Promising young racing car driver Joe Joe Quillico (Fabian) leaves the stock car racing scene in the United States in order to persue Grand Prix racing in Europe. After limited success he manages to win the Spanish Grand Prix. His love life however, is much less successful and his winning on the track only serves to alienate the woman he loves - with unhappy consequences.

Jo-Jo Quillico, an unrestrained racing car driver, is hired by a race car tycoon to be runner-up for a more experienced driver in the year's big European trophy races. Their common mechanic, Charlie, is also Jo-Jo's close friend, sharing in his fast life. In the first race, Jo-Jo cannot help but try to win and burns out the expensive car's engine in the process. Jo-Jo then dumps his current girl friend and picks up another to see him through the next round of competitions. She too, however, is dropped when Jo-Jo gets a new car and takes up with another woman, Katherine, for whom he feels the first stirrings of real love. He is also being cooperative with his boss by supporting his racing partner's lead in several races. But his partner is injured, and Jo-Jo, given his chance, scores several spectacular victories. Now an international figure among racing drivers, he must deal with the marital aspirations of Katherine. Aware that his way of life could never include marriage, Jo-Jo coldly replaces Katherine with a woman willing to share his carefree existence.