Lost in the Sanctuary's huge maze of corridors is a boy: his age uncertain, his real name unknown. They call him Cale. He is strange and secretive, witty and charming - and violent. But when he opens the wrong door at the wrong time he witnesses an act so horrible he must flee, or die.
The Redeemers will go to any lengths to get Cale back.
Not because of the secret he has discovered.
But because of a more terrifying secret that lies undiscovered in himself.