In "Mission: Impossible - The Final Reckoning," Ethan Hunt and his team are in a race against time to stop a rogue AI, known as the Entity, from causing global destruction. The Entity has infiltrated intelligence networks worldwide, and Hunt must use his skills and the help of new allies to prevent a nuclear Armageddon. Ethan must work with new allies and a mysterious figure from his past to prevent the Entity from changing the world as they know it, all while facing the potential for nuclear annihilation.