In this intense historical thriller, set during the Cold War, Captain Alexei Vostrikov (Harrison Ford) is tasked with commanding the Soviet Union's first nuclear submarine, K-19. Under immense pressure, the crew faces a catastrophic reactor failure that threatens to spark a global nuclear disaster. As tensions rise and radiation levels soar, Vostrikov and executive officer Mikhail Polenin (Liam Neeson) must navigate both the malfunction and their conflicting loyalties to save their crew and avoid a deadly confrontation with the world. Will they avert disaster in time?