Lawman Kirk Baxter (Brown) is sent to investigate a rash of thefts of gold bullion from a mine and the disappearance or murder of passengers of stagecoaches in the area. In his investigation, Kirk discovers the passengers are kidnapped to become slave laborers for the outlaws in a hidden cave. Kirk discovers that the gang has been tipped off to the shipments by a mine employee sending carrier pigeons. Kirk suspects mine superintendent Carson (Cassidy). Kirk identifies one of the gang members and follows his horse to the secret hideout. Kirk is captured, but manages to escape, freeing all the prisoners, when the gang leaves to rob another shipment. Can Kirk and his new friends stop the outlaws in time?