Ten holidaymakers are bound for Katastrophos, a tiny Greek Island steeped in superstition and ancient myth. Ten people whose lives are about to change forever, because one of them is planning a ruthless murder. Detective Inspector Jack Dawes of the Murder Squad is working undercover to prevent it, and takes his wife, Corrie, to the island, ostensibly on a belated honeymoon. Mayhem ensues when a storm destroys the island's primitive communications, cutting it off from civilisation. This, and a bizarre island ritual, provide the murderer with a perfect opportunity - but fate intervenes. Finally, time runs out and a deadly battle of wits develops between policeman and killer. It is Nemesis, dark-faced goddess of justice, who ends it with her powerful spirit of vengeance and retribution. Of the ten who arrive on Katastrophos, not all will return home.