Roller-skating through Venice Beach, the Optimist (Enn Reitel) runs into a racing driver, the Girl (Dinah May). After helping her fix a bust tire, he follows the Girl to the racing circuit where he becomes a mechanic before deciding to disguise himself as one of the top drivers. Suddenly it's Grand Prix time and the race is on. The prize is not only the cup - the Optimist also hopes to win the girl from his rival, a bad-tempered Cabbie (Robert Davi). He comes in first, but fame is brief. It's a fast getaway before anyone can find out his true identity.