Shay Phillips knows her way around Dark Canyon. She's handy with a gun and can track a wild animal with the best of them. It's humans who usually give her the most trouble. And with a hormonally charged teenage brother to raise - and her own admitted weakness for the wrong kind of man - they're giving her plenty of trouble these days. Then there's the matter of murder. As an expert on mountain lions, Shay is skeptical when a local prostitute turns up mauled without a drop of blood near the body.
Now, together with the town's newly arrived sheriff, Luke Meza - a Las Vegas city boy with his own dark secrets - Shay must navigate a dangerous valley filled with angry ex-lovers, unfaithful spouses, and poisonous snakes in a desperate search for the killer.