Convicted corporate criminal Howard engineers a prison break as he and a number of fellow inmates are being transferred to a new facility. The escapees storm a shopping mall and take a group of shoppers hostage (after killing many more of them) before making their demands. Only Rudy, a former mercenary and brother of one of the fugitives, can take out the criminals before more of the hostages die.
Jack Traven, an LAPD cop on SWAT detail, and veteran SWAT officer Harry Temple thwart an extortionist-bomber's scheme for a $3 million ransom. As they corner the bomber, he flees and detonates a bomb vest, seemingly killing himself. Weeks later, Jack witnesses a mass transit city bus explode and nearby a pay phone rings. On the phone is that same bomber looking for vengeance and the money he's owed. He gives a personal challenge to Jack: a bomb is rigged on another city bus - if it slows down below 50 mph, it will explode - bad enough any day, but a nightmare in LA traffic. And that's just the beginning...