Kerry O'Day, a genius engineer, revered by his peers and employers, is forced to make a career change. Idiotically, he decides to go for a career in selling - a world of people persons where social skills are the passport to success. Alas, Kerry's social skills hardly allow him to say good morning, let alone sell anything. Bewildered at first, he then hits upon the idea of selling by purely engineering principles. These are eccentric to say the least and leave a trail of destruction through the financial districts of the CBD. Goaded by his need to prove himself to his daughter and prise her away from her ghastly boyfriend, Kerry goes for gold, but only tunnels his way further and further into chaos.