The Warriors of the Mist have fought side by side for centuries, but Kane alone has felt something darker calling to him. With the Kingdom of Agathia on the brink of rebellion, Kane knows that relying on dark magic to infiltrate the enemy's court is dangerous but necessary despite the cost to his soul. Lady Theda hopes to end the tyrannical reign of Duke Keirthan, the man who killed his own brother: Theda's husband. But she has little hope of succeeding, until a mage-marked warrior appears. Kane is now tempted, not by dark magic, but by a woman who needs him.