After the two Yeti—that Dr. Harry Olson, an American paleoanthropologist, and his wife, Dixie, brought home from the mountains of Mongolia—escaped from the Cinder Mountain Research Facility and were killed by police, one of the scientists in Harry's anthropology department at California Pacific University, Dr. Millie Harbaum, uses sperm and an egg, taken from the two Yeti before they escaped, to create a baby Yeti and implants the embryo into a female chimp. But unbeknownst to Harry, Millie has added human DNA to the embryo, actually creating a chimera. When the baby, Roku, is born, he is clearly not a full Yeti, and Millie is forced to confess what she has done. Horrified, the university demands that the infant be destroyed immediately. But Millie flees before they can act, taking Roku with her and unleashing a chain of events that may have deadly consequences, not only for Roku and Millie, but for humanity as well...

Deep within the remote Altai Mountains of Mongolia there exists a heinous mystery, one the locals have attempted to keep secret for generations. Now, Harry Olson, an American paleoanthropologist, is in the area excavating for early human fossils. What his team discovers threatens to turn modern scientific knowledge on its head and disrupt the peaceful harmony of the largely superstitious country. It is a discovery so appalling, so sinister, that the lives of the expedition members are at risk from a determined fossil pirate who learns of their discovery and vows to make it his own. Harry and his research team fight to outwit the man who is out kill them and steal their find, but first they must escape the terrible evil they have uncovered...

Dr. Harry Olson, an American paleoanthropologist, and his wife, Dixie, have returned from the mountains of Mongolia with two live Yeti, a male and a female. A team of scientists in Harry's anthropology department at California Pacific University are now trying to uncover a link between human and Yeti genetics. But when the Yeti escape, Harry's in a race against time to recapture the animals, knowing only too well how the terrible consequences will be if the creatures make it off the desolate high-desert facility and reach a human city...