“Adam Chaser” –that’s what Bill Jonathan called Professor Abington, an archaeologist searching caves in the Nevada mountains for hieroglyphics and fossil remains. Bill was dodging the Sheriff when he accidentally came across what the Professor was seeking, and he was glad enough to join forces and turn guide. Betsy O’Donovan and her niece, Jean, however, invaded the locality and, though they were only seeking valuable minerals and regarded the two men as rivals in their own field, the Professor was sure that they were sent out by a scientific competitor to forestall his discoveries.
With this mutual distrust and suspicion the stage was set for events which involved Abington and Jean in great danger. It was not until they had faced death together as enemies that their real aims were disclosed and suspicions dissolved.