Ballard's trail jumpers attack the Wyatt Company wagon train, killing young John's parents and kidnaping his brother, Jim. In post-Civil War California, John Wyatt, now a man, pulls together a vigilante posse, The Singing Riders, who all ride white horses, dress alike, and ride the trails singing and rounding up outlaw gangs. Meanwhile, John is ever on the lookout for the gang that murdered his parents.

美国南北战争时期，约翰尼·格雷因职被委为火车司机，女友和家人都骂他是胆小鬼。北方联军将“将军号” 连同约翰尼·格雷的心上人一起劫走。作为“将军号”司机的约翰尼·格雷，不但要抢回心爱的火车，更要夺回心爱女人的心……为了抢回他那两项“最爱”，约翰尼不惜铤而走险，深入敌后，驾驶火车救出佳人，并把...