In Nick Shannon's third adventure he is still seconded to the Fraud Squad and is part of the team investigating an insurance company whose policies don't seem to match the premiums they charge. When one of their directors dies in suspicious circumstances Nick goes under cover in their Docklands offices. He discovers a willing work force but a management with an arrogance which could easily prove to be criminal. At the same time his lover, Arlene, arrives from the States having been caught up in a fraudulent property scam and she is keen for Nick to use his skills to bring the conmen to book. Torn between professional and personal obligations, Nick starts a scam of his own to trap the miscreants into proving their own crimes, but it is a scheme which could snare him as well and land him back in jail.