Archaeologist Ivy Carter is no stranger to losing the people she loves.

With the exception of Kyah, an ex- lab chimp at her university, Ivy holds everybody at arm's length, even Orrin James, the brilliant young physicist falling for her.

But when Ivy is stolen 50,000 years back in time to save a dying species of human from extinction, she must battle her demons, inside and out, to prevent a war that could change the course of human evolution forever.

In a thrilling adventure that flips between modern world catastrophe and primitive survival, Ivy Carter holds the fate of humankind...