Tracker Bryn Aven's goal of becoming a member of the elite King's Guard is threatened when she is sent to stop Konstantin, a fallen hero who she once secretly loved, who appears to be kidnapping changelings.

Bryn Aven -- unjustly charged with murder and treason -- is on the run. The one person who can help is her greatest enemy, the enigmatic Konstantin Black. Konstantin is her only ally against those who have taken over her kingdom and threaten to destroy everything she holds dear. But can she trust him? As Bryn fights to clear her name, the Kanin rulers' darkest secrets are coming to light, and now the entire troll world is on the brink of war. Will...