New York City Detective John McClane has just arrived in Los Angeles to spend Christmas with his wife. Unfortunatly, it is not going to be a Merry Christmas for everyone. A group of terrorists, led by Hans Gruber is holding everyone in the Nakatomi Plaza building hostage. With no way of anyone getting in or out, it's up to McClane to stop them all. All 12!

After the terrifying events in LA, John McClane (Willis) is about to go through it all again. A team of terrorists, led by Col. Stuart (Sadler) is holding the entire airport hostage. The terrorists are planning to rescue a drug lord from justice. In order to do so, they have seized control of all electrical equipment affecting all planes. With no runway lights available, all aircraft have to remain in the air, with fuel running low, McClane will need to be fast.

John McClane is now almost a full-blown alcoholic and is suspended from the NYPD. But when a bomb goes off in the Bonwit Teller Department Store the police go insane trying to figure out what's going on. Soon, a man named Simon calls and asks for McClane. Simon tells Inspector Walter Cobb that McClane is going to play a game called "Simon Says". He says that McClane is going to do the tasks he assigns him. If not, he'll blow off another bomb. With the help of a Harlem electrician, John McClane must race all over New York trying to figure out the frustrating puzzles that the crafty terrorist gives him. But when a bomb goes off in a subway station right by the Federal Reserve (the biggest gold storage in the world) things start to get heated up.

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.