Anthony Newley portrays "Dick," the son of Roger Livesey, who plays the affluent but somewhat detached dad, “Paul.” The boy dreads returning to boarding school, yet his stingy father refuses to budge. When "Dick" attempts emotional manipulation, his father – holding a peculiar stone from an Indian temple – inadvertently makes a wish and reverts to the mental age of his son. Recognizing a chance for some trouble, the …