Following his dazzling success passing his driving test first time with nothing more than a few lessons on a milk float and the positive application of his new-found intelligence, Harry now has the rather awkward task of returning his borrowed car with an embarrassingly large dent in its side.

As a first step on his way to the top, Harry applies his genius to bakery van sales. Who better to show him the potential, pitfalls and perks of the round than would-be country and western star, Don 'Doughboy' Hudson?

Having been 'promoted' to office duties to keep him out of trouble, Harry finds that his genius is not being fully exploited and his only real challenge is facing the endless tedium. Until, that is, he mistakes the company chairman for a cleaner and joins him in a rather over-large brandy.