Bruce Willis is back as iconoclastic, take-no-prisoners cop John McClane, who for the first time finds himself on foreign soil after traveling to Moscow to help his wayward son Jack (Jai Courtney) - unaware that Jack is really a highly-trained CIA operative out to stop a nuclear weapons heist. With the Russian underworld in pursuit, and battling a countdown to war, the two McClanes discover their opposing methods make them unstoppable heroes.