What price friendship? - Detective Constable Andy Gregg is security officer for Kent County CID, and takes his responsibilities very seriously. But when a robbery occurs just days after Andy has performed a security survey, tongues start wagging. Then it happens again with fatal consequences. Suddenly Greggs superiors are faced with the very real possibility that someone inside CID is selling privileged information and the obvious suspect is Gregg himself . . .

Is the solution to this mystery lost at sea? When Captain Sewell is found battered in his cabin aboard the Hakota, Felix Dunn takes command. It emerges that the ?upright? Captain had some diamonds on board ? and they are missing. Suspicion soon falls on Dunn. His estranged wife has been overspending ? and he has been in trouble before. But the attractive DC Helen Ryan believes he is not their man and is prepared to go some way to find out the truth.