At the age of 63 Philip Drury was 25 years away from his days as a ''boatrider'' - a conman afloat. At that time his criminal partner had been a man called Mark Russell. In the years in between Drury had built up a hugely successful stud and become involved in property speculation - and in doing so had lost virtually everything.Drury was not a man to accept defeat. He needed to locate Mark Russell and give ''boatriding'' one last go. A cruise liner is selected but in the Caribbean where the ship will cruise two young American conmen have exactly the same idea . . .