It is an Age of Monsters and all that remains of humanity are scattered encampments of ragged refugees. Mark Bakker has survived the prehistoric wilderness alone… until now. After unwittingly plundering a tyrannosaur-nest, he finds himself relentlessly hunted by the wrathful mother. But it is not salvation he finds when he stumbles across a young woman and her mysterious band of sisters living in the mountains. Even in the Age of Monsters, humans are always the most dangerous animals. And the female is always the deadliest of the species.