Towards the end of the American Civil War, a rebel captain flees to Colorado to join a band of Southern mercenaries. He drags an innocent gold prospecting couple into trouble when the husband is accused of a murder he committed.

Jim Gordon commands a unit of the famed Flying Tigers, the American Volunteer Group which fought the Japanese in China before America's entry into World War II. Gordon must send his outnumbered band of fighter pilots out against overwhelming odds while juggling the disparate personalities and problems of his fellow flyers.