Since Webb Carrick, of the Scottish Fishery Protection Service, had had trouble before with the crusty master of the Tecta, he isn't surprised that the Norwegian trawler has once again sliced through another boat's fishing nets. But among the masses of struggling fish in the Tecta's nets is a larger, darker, ominously motionless form...the body of a diver. And Carrick knows without looking that this is the body of the marine biologist who had been missing now for ten days. Is this a case of accidental drowning? Carrick thinks not, in view of the scientist's connection with Crosslodge, the local nuclear power station - and then an attempt is made to deliver Carrick to that same watery grave...

Genre: Mystery