Margot Lewis is the agony aunt for The Cambridge Examiner. Her advice column, Dear Amy, gets all kinds of letters - but none like the one she's just received: 'Dear Amy, I don't know where I am. I've been kidnapped and am being held prisoner by a strange man. I'm afraid he'll kill me. Please help me soon, Bethan Avery.' Bethan Avery has been missing for nearly two decades. This is surely some cruel hoax. But as more letters arrive, they contain information that was never made public.
In a future world, life is tightly controlled by the all-powerful PareCo. Standing out from the crowd is dangerous, so misfit Luna hides her secrets carefully, not realising her own power. Unlike her friends and family, Luna has never been able to plug into Realtime, PareCo's virtual world, where almost everyone now lives their lives. So how do PareCo know about Luna, and why do they want her for their elite think tank?