When they are tipped off about a train carrying a safe full of money and gold, Butch Cassidy and The Sundance Kid assemble a team to pull off one of the Old West's greatest train robberies. Their devious plan is to use official Union Pacific lanterns to signal the train and fool the engineer into believing a bridge is out. Along with the other members of the Wild Bunch, Butch and Sundance take control of the train when the engineer stops, blow up the safe, and get away with a fortune.