Gash-Eye already thought life was hard, as the Neanderthal slave to a band of Cro-Magnons. Then zombies attacked, wiping out nearly everyone she knows and separating her from the Jaw, her half-breed son. Now she fights to keep the last remnants of her former captors alive. Meanwhile, the Jaw and his father try to survive as they maneuver the zombie-infested landscape alongside time-travelers from thirty thousand years in the future….