"A night spent sleeping on dirt and leaves is not how Claire Matchett expected to spend her vacation. She thought this would be a break from the stresses of work and raising her young children. A chance to repair her damaged marriage. A week of hiking and hot tubs with friends. It sounded like heaven. Then Claire's minivan breaks down on a lonely dirt road. With no cell reception, the group has no choice but to hike the rest of the way to their hotel....

Colorado Bureau of Investigation Agent Frances Cash investigates after a billionaire's son and his new wife are kidnapped and murdered by a gang of eco-terrorists at a park where extinct animals are brought back through genetic manipulation.