Fifteen-year-year-old Callie Hall has just found out that she is a witch...and things keep going wrong. Sometimes her mind seems to make things happen, things she cannot control. She can set fire to things without a match, and when she’s angry people can get hurt.

Her friend Josh understands that she’s a bit strange, but it is only on a dark and dangerous visit to the tunnels beneath the ruins of St Andrews’ castle that he realizes just how strange she really is. Something comes back with Callie—in Callie—something she cannot escape.

Can Callie control her power long enough to send back the darkness before it takes over her life? Will Josh ever understand her secret?

A brilliant, engrossing young people’s fantasy from the author of Winterbringers and The Keeper’s Daughter.