 Parkman has hired a vicious gunfighter, Orville Miller, to kill Catlow.Offering to turn himself in, Catlow joins Cowan on a stagecoach to Fort Smith, but his men stage an ambush.Catlow heads for Hermosillo, Mexico, where a woman named Rosita is in love with him and a $2 million shipment of gold is arriving soon by mule train.The ranchers send Cowan after him along with Miller.