What's causing the deaths of desert bighorn sheep in Death Valley National Park? Wildlife veterinarian Olivia Landon has been called in to investigate. The plot thickens when her daughter, Ashley, is kidnapped by militants who mistake her for Leesa, a mysterious girl temporarily in the Landons' care. When Ashley's brother Jack discovers why Leesa is on the run, he is determined to protect her. But how can he do that and save his sister too? One thing he knows for sure, failure is not an option. Tension builds to a spine-chilling climax when a showdown in the desert leads the family to a missile testing site and the key to what is killing the sheep.
