Somewhere outside of Bakersfield, 1919: The Dell Boys Gang rob a train full of ancient Egyptian treasures, but get way more than they bargained for when they awaken the mummified remains of an evil Pharaoh and his army! 

The Dells have been in tough scrapes before, but now they're chased by mummies on one hand and about to get nabbed by Sheriff Dwight Owens on the other. If they're caught, it's not just the law they have to worry about, because Sheriff Owens' daughter Sally is the "wildest half-puma little girl" in the West, and she don't take kindly to train-robbin' scallywags.