Dr. Angie Rippard is an Arizona wildlife biologist who is drawn into a police investigation when two teenagers are found dead on a golf course that borders protected National Forest Land. Rippard suspects the teens were attacked by a large mountain lion. Rippard believes that the resort was developed too close to wilderness lands, but her plan to relocate cougars in the area provokes the wrath of the resort's owner-Charlie Rutledge-who believes the animals should be exterminated. Deep inside the Tonto National Forest, Rippard and her grad students realize that Charlie Rutledge is hunting them. In a thrilling climax, Rippard must make a choice to kill the cougar that is certain to kill Charlie Rutledge, or kill Rutledge who is certain to kill her. Now we are the endangered species.

Down on her luck and bankrupt, embattled wildlife biologist Dr. Angie Rippard accepts a long-shot assignment from the governor of Colorado to determine once and for all if grizzly bears are completely extinct in the southwest corner of the state. No one has seen a grizzly north of Durango since 1979, but the governor needs proof to halt development of a 6,000-acre ski resort that will devastate the natural resources of the region. What Angie finds will forever disrupt construction of the 500-million-dollar resort, and pits her against powerful political forces that will stop at nothing to see that her research never sees the light of day… even if it means hunting her to her death through the worst snowstorm ever seen in the mountains near Telluride.