Park Service surveyor and former FBI forensic specialist Jack Randall finds himself swept away in a diabolical journey through a mystical primitive world. Following a naked man captured by aborigines, Jack steps through a vortex into a prehistoric 13th century Mesa Verde culture. Accompanied by a shaman of the Butterfly Clan, the shaman's lively and lovely granddaughter and Jack's best friend Spade, he searches the American Southwest 800 years in...