Armed men hijack a New York City subway train, holding the passengers hostage in return for a ransom, and turning an ordinary day’s work for dispatcher Walter Garber into a face-off with the mastermind behind the crime.
After the Cold War, a breakaway Russian republic with nuclear warheads becomes a possible worldwide threat. U.S. submarine Capt. Frank Ramsey signs on a relatively green but highly recommended Lt. Cmdr. Ron Hunter to the USS Alabama, which may be the only ship able to stop a possible Armageddon. When Ramsay insists that the Alabama must act aggressively, Hunter, fearing they will start rather than stop a disaster, leads a potential mutiny to stop him.