A series of burglaries point to the use of bionics, and Steve falls under suspicion. Steve is approached by Gillian, an alien whose fellow explorers were first encountered by Steve in The Secret of Bigfoot. Gillian restores his memory of those experiences in order to gain his assistance. A rebel splinter group of aliens, led by Nedlick, have damaged the alien power generator, and have taken the Sasquatch. Steve agrees to help, but suspicion of him grows as he refuses to reveal the information that could clear him. When he finally tells Oscar, who doesn't believe him, Steve flees. Meanwhile, Jaime Sommers has overheard the truth about the aliens, and her faith in Steve makes her believe it. The alien rebels have set up a new base in Mexico, and are drilling into an extinct volcano for geoth