在这部沙西部片中,杰夫·基恩的一匹名贵的会表演的马从火车上逃跑，在科罗拉多州的沙漠和荒野中狂奔。基恩在寻找马的同时，马也学会了野外的生活方式。
A show horseman, Jeff Keane (Mark Stevens), loses his prize stallion, Jubilee (Sun's Red Shadow), as a result of a train wreck in Colorado, and enlists the aid of rancher Joan Hartley (Colleen Gray) in tracking the horse. Jubilee responds wildly to freedom and presents problems to those who capture and treat it badly. By the time Jeff locates Jubilee there is the fear it may have turned killer.
