A raucous race across the Emerald Isle runs afoul of a clan of leprechauns determined to protect their pot o' gold.
The Racers swing into action to save Peter, who has been kidnapped by a crazy fan.
The Racers meet up with Hong Kong Phooey during a thrilling adventure in China, where the evil organization K.I.T.T.Y., led by Golden Paw, mistakes Muttley for Hong Kong Phooey.
In a race through the Appalachian Mountains, the Racers compete against various guest stars Huckleberry Hound, Ricochet Rabbit and Touché Turtle.
After discovering that Muttley lives a double life as a Secret Agent, Dick Dastardly tag along with him and Agent Z to stop the evil Dr. Doomsdoctor as he devises a plan to make the moon come to earth.