Isla Brùn, the last of her lineage, possesses a healing gift—and a legacy that strikes fear into her village. Branded a witch after her grandfather, her sole protector, passes away, she faces isolation and danger at every turn. Her only hope lies in a half-forgotten promise: a life debt owed to her family by Laird Sinclair.

Deep in the woods, fate intervenes when Isla stumbles upon Aidan, a gravely injured warrior burdened by his father's unattainable expectations. Moved by her limitless compassion, Aidan vows to protect her, pledging to escort her safely to the Sinclair clan.

Together, they embark on a perilous journey through the Highlands, relentlessly pursued by those who deem Isla a witch. With every step, their bond grows stronger, but so do the forces determined to tear them apart.

Will their love withstand the trials fate has set before them, or will duty and suspicion doom them forever?