Beaver Greenway, a longtime horse owner with a drinking problem, is upset because one of his mares has been lured away by Thunderhead, the wild stallion that previously belonged to Rob and Nell McLaughlin. He goes to Goose Bar Ranch to assist in the hunt for the wild stallion, who is now well known for taking the Albinos place in stealing mares from many different states but the McLaughlins no longer have any control of the horse.