During a party, Lucy McClane (Mary Elizabeth Winstead) is kidnapped by an unknown group of German terrorists. 3 weeks goes by and no one has heard from her since the night of the party, Authorities give up their search and presume that she was killed but when a video of Lucy being held hostage and warning everyone that the terrorists plan on dropping an atomic bomb on America unless their needs are met is nationally televised around America. Within 40 minutes of the hostage video being aired the McClane residence gets a mysterious phone call from who seems to be the leader of the terrorist group, he exclaims that he will kill John and his family and finally get his revenge and right before he hangs up the phone he says "Gruber Out". The NYPD discover that the leader of the terrorist group is Frederick Gruber (Tom Hiddleston), Simon Gruber's son and the last known relative of both Hans and Simon. John McClane (Bruce Willis) comes out of retirement and returns to the NYPD for one last mission, to save his daughter. John must now team up with the NYPD's Prodigy, Tyreese Bane (Lakeith Stanfield) along with a few old friends in order to save and Lucy and prevent America from becoming a nuclear wasteland.
