On the July 4th holiday, an attack on the vulnerable United States infrastructure begins to shut down the entire nation! But as New York City police detective John McClane delivers old school justice to a new breed of terrorist when a massive computer attack hacker on the U.S. infrastructure threatens to shut down the entire country over Independence Day weekend!

Its not the crime, its the cover up. In small town, hard scrabble New Hampshire, foul mouthed all talk slacker John Rugged Rudgate fancies himself a criminal. When a local plumber stares him down at a pub, Rugged vows revenge, pouring brake fluid in the mans water supply. When the man dies from unrelated causes, Rugged and his side kick, the even dimmer Jeff, try to cover up what they think is murder. One bad decision begets another.

John McClane takes on an Internetbased terrorist organization who is systematically shutting down the United States.

When someone hacks into the computers at the FBI s Cyber Crime Division; the Director decides to round up all the hackers who could have done this. When he s told that because it s the 4th of July most of their agents are not around so they might have trouble getting people to get the hackers. So he instructs them to get local PD S to take care of it. And one of the cops they ask is John McClane who is tasked with bringing a hacker named Farrell to the FBI. But as soon as he gets there someone starts shooting at them. McClane manages to get them out but they re still being pursued.

When someone hacks into the computers at the FBI s Cyber Crime Division; the Director decides to round up all the hackers who could have done this. When he s told that because it s the 4th of July most of their agents are not around so they might have trouble getting people to get the hackers. So he instructs them to get local PD S to take care of it. And one of the cops they ask is John McClane who is tasked with bringing a hacker named Farrell to the FBI. But as soon as he gets there someone starts shooting at them. McClane manages to get them out but they re still being pursued. And it s just when McClane arrives in Washington that the whole system breaks down and chaos ensues.