A slick New York publicist who picks up a ringing receiver in a phone booth is told that if he hangs up, he'll be killed... and the little red light from a laser rifle sight is proof that the caller isn't kidding.

A computer hacker breaks into the computer system of the Seabourn Legend cruise liner and sets it speeding on a collision course into a gigantic oil tanker.

Los Angeles SWAT cop Jack Traven is up against bomb expert Howard Payne, who's after major ransom money. First it's a rigged elevator in a very tall building. Then it's a rigged bus--if it slows, it will blow, bad enough any day, but a nightmare in LA traffic. And that's still not the end.