Three years after a virus wiped out most men on earth, Cole's son, Miles, is one of the rare survivors. Yet in this changed world, there are women who would kill to get their hands on that most prized commodity - a living boy. Getting Miles to safety means crossing America with deadly pursuers hot on their heels - including Cole's own sister, Billie. But if there are some who will commit any crime to possess Miles, Cole must face some terrible choices to protect her son . . .