By the 2050s, bad parenting and crack-pot theories of child-rearing have left millions of young people irredeemably feral. The answer? To create a vast detention centre covering most of north Wales. This is The Cage and its perimeter is guarded by the hunters, whose task is to stop escaping yoofs — by lethal force. usually. Jade Fallon’s sister is in The Cage and her mother is dying. When she approaches a hunter, hoping that he can tell her how to get a message to her sister, he tells her it is impossible. But fate intervenes and Jade sets out on an adventure that will change everything.