Fingest Yachts, based in the south of England, is a leading small boat company. It's founder, Frank Fingest, has recently died, leaving his son's wife, Debbi, to run the business. Debbi's husband Harry is Frank's son by his first marriage, a likeable man in his twenties, who is not really into business, so he has set off on a round-the-world in a Fingest yacht with his best mate Gerry. Before leaving the Galapagos islands on the long haul across the Pacific to the French Marquesas, he sends a routine letter to his wife. All's well, nothing to report. Then silence. They have disappeared in the vastness of the Pacific. Tom Wells happened to be the man who delivered the Letter from Galapagos to Debbi and when her husband became seriously overdue she asked Tom to travel to the Pacific to see if he could find out what had happened to husband Harry. To say any more would reveal the plot!