When the daughter of American millionaire Randolph G. Sheridan goes missing while attending university in London, England, her father has no alternative but to hire New York private detective Simon Barrett to investigate her disappearance... Met only by a wall of silence from the British authorities and without his precious handgun which he is not permitted to carry in the UK, Simon quickly begins to realize that the fate of young Tamara Sheridan may well turn out to be a good deal darker than he first supposed - a suspicion which is soon confirmed when he discovers to his horror that he is not the only person searching for Tamara, but that she is also being stalked by a mysterious woman called Sterling who just so happens to take her orders directly from the Vatican... And what happens next is the stuff of nightmares... !!!