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Ed Hart (Dale Van Sickel) and his band of outlaws are using a wild stallion to smuggle diamonds over the border. But this fact has escaped the knowledge of Stormy Billings (Dale Evans), a young rancher who is taken with the horse and wants to tame him. Stormy enlists the help of a handsome cowboy named Roy (Roy Rogers) and his faithful horse, Trigger, to capture the stallion, but his efforts quickly put him into conflict with Ed and the rest of his gang. Wikipedia