The year is 2059. Nineteen-year-old Paige Mahoney is working in the criminal underworld of Scion London, based at Seven Dials, employed by a man named Jaxon Hall. Her job: to scout for information by breaking into people's minds. For Paige is a dreamwalker, a clairvoyant and, in the world of Scion, she commits treason simply by breathing.
It is raining the day her life changes for ever. Attacked, drugged and kidnapped, Paige is transported to Oxford – a city kept secret for two hundred years, controlled by a powerful, otherworldly race. Paige is assigned to Warden, a Rephaite with mysterious motives. He is her master. Her trainer. Her natural enemy. But if Paige wants to regain her freedom she must allow herself to be nurtured in this prison where she is meant to die.

Paige Mahoney has escaped the brutal prison camp of Sheol I, but her problems have only just begun: many of the survivors are missing and she is the most wanted person in London...
As Scion turns its all-seeing eye on the dreamwalker, the mime-lords and mime-queens of the city's gangs are invited to a rare meeting of the Unnatural Assembly. Jaxon Hall and his Seven Seals prepare to take centre stage, but there are bitter fault lines running through the clairvoyant community and dark secrets around every corner. Then the Rephaim begin crawling out from the shadows. But where is Warden? Paige must keep moving, from Seven Dials to Grub Street to the secret catacombs of Camden, until the fate of the underworld can be decided.