A sorcerer gives Alex Denton unlimited power as long as he never rides in a vehicle of a certain color, but the sorcerer refuses to say which color. Denton tricks the sorcerer into revealing the color, but then he is in accident that leaves him color blind and he accidentally enters a car of the forbidden shade.
Tom Grayson follows his father into the family business as a circus clown, though the family line is subject to an ancient curse. But Tom finally breaks the curse by learning to laugh at himself.
Criminals use a phony sword of King Arthur to defraud the public, but when one of the criminals kills his partner and then loses the sword in the ocean he must dive for it. Below he finds the real sword of King Arthur, but it severs his air hose and he dies too.