At an Antarctica research site, the discovery of an alien craft leads to a confrontation between graduate student Kate Lloyd and scientist Dr. Sander Halvorson.
Two separate sets of voluptuous women are stalked at different times by a scarred stuntman who uses his "death proof" cars to execute his murderous plans.
John McClane travels to Russia to help out his seemingly wayward son, Jack, only to discover that Jack is a CIA operative working undercover, causing the father and son to team up against underworld forces.