For years, the lands of women and men have existed side by side in relative peace. Glori has never questioned the separation of the sexes, nor the rules that keep her community safe. But when her mother secretly gives birth to a boy, she grows to love the child and starts to wonder: Could all men really be 'beasts'? When her brother is taken back to the City of Beasts in a rare attack, Glori decides to infiltrate the city to get him back. But when things go awry, Glori meets Sway and learns that - just like women - men are not all alike. And they might just help her save the world.