The star of this slapstick comedy is not a person but an antique Bentley sports car, the source of several misadventures. Murdoch Troon (Stanley Baxter) is a simple civil servant who has his heart set on romancing Claire (Julie Christie in an early role), the daughter of wealthy businessman Charles Chingford (James Robertson Justice). As a part of his scheme to appear irresistible, Murdoch takes driving lessons so he will be able to impress Claire in the Bentley. Both the lessons and his driving test produce moments of hilarity, and as might be expected, there cannot be a movie featuring a car without a wacky, wild chase.