In the 56th film of the 66 in the series (and the first one produced by William Boyd Productions instead of Harry Sherman), Hopalong Cassidy undertakes to help out his old friend, Army Colonel Jed Landry. The Colonel's hot-tempered son, Lieutenant Bruce Landry, has struck his commanding officer and is facing a court martial. Bruce deserts and is believed hiding at a robber's hideout-town known as Twin Buttes. Cassidy departs without telling his two pals, Lucky Jenkins and California Carlson, but they learn his destination and follow him. Hoppy arrives at Twin Buttes and attempts to register at the inn ran by Jessie Dixon but she is suspicious and refuses him a room. Cassidy makes friends with "Professor" Dixon, Jessie's father, and is given a room. Bruce is being kept in a hideout by a group of holdup men headed by Dixon, and has fallen in love with Jessie.