After Mike Hammer witnesses Wall Street superstar Vincent Colby getting clipped by a speeding red Ferrari, the shaken victim's stockbroker father hires Hammer to find the driver. But the toughest private eye of them all soon is caught up in a series of bizarre, seemingly unconnected slayings marked by a forbidden martial arts technique.

What do a lovely redhead, a short-tempered bartender, an exotic call girl, a murdered police inspector and a movie stuntman have to do with a scheme that might have transformed young Colby into a psychological time bomb?