Cyber-Thriller: When her younger sister and brother don't come home from the mall, Christine Bailey knows something is horribly wrong. With no ransom note and no leads, the police are stumped. In desperation, she turns to Lesse and Harmon, two quarrelsome friends with intimate knowledge of online computer worlds into which she's convinced the two kids have disappeared. What follows is a nightmare tour through the Internet's unfathomable underside and a chilling confrontation in cyberspace with dire real life implications.