NYPD cop John McClane's plan to reconcile with his estranged wife is thrown for a serious loop when, minutes after he arrives at her office, the entire building is overtaken by a group of terrorists. With little help from the LAPD, wisecracking McClane sets out to single-handedly rescue the hostages and bring the bad guys down.

John McClane is back and badder than ever, and this time he calls on the services of a young hacker in his bid to stop a ring of Internet terrorists intent on taking control of America's computer infrastructure.