In this explosive psychological thriller, Allen and Cynthia Hunt are a well-educated, upper middle-class San Francisco couple who experience the ultimate domestic nightmare. A deranged, seedy truck driver barges into their lives, blackmailing Cynthia into becoming his "drive-by" wife. Billy has led a lonely, bleak existence on the road and has always dreamed of "having him a beautiful, lovin' woman to come home to". Unable to go to the police, Allen and Cynthia desperately try to fight off the twisted stalker, who will stop at nothing to get what he wants. But the two have serious problems of their own. The story spirals into a tangle of deceit, deception, and murder. Can Allen and Cynthia unite and defeat the diabolical maniac from the hills, or will he destroy them both?