Seventeen-year-old Lane McEvoy must go back into the Feral Zone with her father to retrieve blood samples from the fifty-plus DNA mutations that have caused humans infected with the virus to turn into animal hybrids and go feral. She's also on another mission--to find the roguish Rafe who was infected months before. She recruits the help of a band of lion-women to track him down, horrified that she might have to fulfill her promise of putting Rafe down if he's gone feral.