McAuliff has been given two million dollars for a geological survey of Jamaica's dark interior. All Dunstone Ltd requires is his time, his expertise, and absolute secrecy. But British Intelligence is aware of the deal, and they've let Alex in on a secret: the last survey team Dunstone despatched to Jamaica vanished without trace. For Alex, it's too late to turn back. He already knows about Dunstone - which means he knows too much. From the moment he lands in Jamaica he is a marked man. But who wants him dead? In an island paradise where even a beautiful woman could be a spy, Alex's only clue to survival is a single, mysterious word: Halidon...