Dave Mason (James Bush), owner of a traveling tent show, and Maurice (Gerald Mohr), one of the performers, are secret agents of a Nazi sabotage ring. Texas Governor Shuvile (Russell Hicks) appoints rodeo star Roy Rogers (Roy Rogers) to investigate the ring. THe appointment is secret and Roy reports directly to the governor. Roy, noting the sabotage is always near where the tent show is playing, attends the show with his pal Frog Millhouse (Smiley Burnette), and with the aid of Maurice's two female assistants , Judy Mson (Peggy Moran) and Ruby Smith (Dorthea Kent),both unaware of Maurice's villainy, are hired for a week long engagement as singers. Roy uncovers proof that Dave and Maurice are members of the gang, but decides to make no arrests until he learns the identity of the gang leader. Maurice kills Dave and frames Roy for the crime . The Governor has been injured in a car wreck and is unable to verify Roy's story.
—Les Adams <longhorn1939@suddenlink.net>