Alan Rosslyn, special investigator for the intelligence and security advisor Campbell and Menzies Tunim, is mixing business and pleasure in Greece, where he has fallen in love with his client, Cleo Ipsilanti. On the eve of his reluctant departure for London she is the victim of a murderous attack. When Rosslyn discovers that a powerful British special Intelligence Service clique is actively encouraging an attempt by a Greek billionaire to steal the Elgin Marbles, he is dragged into the conspiracy with devastating consequences.