Frankie suspects that a serial killer may be on the loose, a man who is so good at assuming new identities that he almost resembles the shape-changers of Native American myth. When Frankie is asked to join a expedition into the Mojave desert, she jumps at the chance to get away from the mayhem, but trouble follows her, with near-fatal results.
Geologist Frankie MacFarlane is drawn into a police investigation when the remains of her former fianc are found in the desert. After a student and several of her colleagues are attacked, Frankie realizes she may be the killer's next target.