Tumbledown Ranch In Arizona Apr 19, 1941

Rodeo contestants Johnny King and Corrigan meet, their fathers having been members of the Range Busters. When Johnny is knocked unconscious, time reverts to their father's era and the Range Busters are soon involved in the scheme to get Railroad right-of-way across Mother Slocum's ranch. When she is tricked into signing a release, the Range Busters find their job more difficult as the Sheriff is in with the crooks.