The beautiful Isobel of Aberlady is coveted by many men for the power of her prophetic visions. Her father has kept Isobel isolated at Aberlady Castle for this very reason. But when he is taken prisoner in battle, Isobel must rely on her own resources to protect her besieged castle and its people. Just when all hope seems lost, James Lindsay, Scottish knight turned outlaw who's known throughout the land as the Border Hawk, scales the high castle walls to save her. Isobel obeys the counsel of her guards and escapes with James, certain that he will deliver her safely to her betrothed, Sir Ralph Leslie.

But James has other plans. Leslie is his sworn enemy, and her betrothed has taken James's cousin hostage. Isobel discovers that she has exchanged the threat of capture by the English king for kidnapping by the legendary Border Hawk--an outlaw that her own prophecies branded a traitor to her beloved Scotland. When James's plan for a swift trade of Isobel for his cousin go awry, the unlikely pair retreat to a forest stronghold, where the hardened warrior finds the lure of the gentle lady more than he can deny. The obstacles that lie between the two and happiness are many, including their own honor, loyalty, and sworn vows. If the strength of his sword arm can't save her, can the Border Hawk use his wits to gain his beloved Isobel?