A hardened convict and a younger prisoner escape from a brutal prison in the middle of winter only to find themselves on an out-of-control train with a female railway worker while being pursued by the vengeful head of security.
Los Angeles, California. Officer Murphy, a veteran Metropolitan Police helicopter pilot suffering from severe trauma due to his harsh experiences during the Vietnam War, and Lymangood, his resourceful new partner, are tasked with testing an advanced and heavily armed experimental chopper known as Blue Thunder.
A deranged engineer, bent on revenge for the deaths of his wife and daughter, sets two passenger trains on a collision course, and con-man William Shatner puts his life on the line to ward off the crash.