 Cheyenne and Smitty are in the desert making maps when they spot Shoshone smoke signals. They take to high ground where they are met by Bob Manson and his gang. They have spotted the signals too and are taking refuge on the huge rock fortress. When a stage coach comes under attack Cheyenne, Smitty and Manson s men fight off the Indians but Manson reveals his true intentions and robs the coach. Soon the coach is followed by a party of soldiers and everyone finds themselves on the rock waiting for a Shoshone attack.