Diana Winslow, trained in knightly skills, becomes the first Bladeswoman in the League of the Blade. In only her second assignment, she kills a lecherous viscount in self-defense and escapes undetected - but the victim's brother, Thomas, becomes the new Viscount Bannaster and the suspect in the murder. Several years later, the League sends a message to Diana assigning her to find out for the king if Tom can be trusted. But Diana is worried that he's discovered that she was the one who killed his brother. In a desperate attempt to avoid prison, she kidnaps and puts him in the dungeon and soon finds herself torn between her duty to the League and her growing desire for her captive.