Outlaw miners have been stealing ore from Ann Dennis' mine. Hoppy spends much of his time running around in the mine shafts tracking down the crooks.

Hoppy's friend Dennis owns a rich gold mine. Frazier who owns the adjoining mine and wants the Dennis mine, has Dennis killed. Hoppy steps in to take over running the Dennis mine and learns Frazier's men sneak into and work the Dennis mine at night. Hoppy captures one of Frazier's men only to be captured in return by Frazier and left to die in a burning building.—Maurice VanAuken <[email protected]>