Lady Isla of Clan Galloway is in love with a Templar Knight, Sir Angus of Galloway, but his vow of chastity prevents them from being together. Overcome by sorrow when Angus leaves her for the order of Holy monks, Lady Isla's arranged marriage to a Duke twice her age hurtles her into a cycle of unending grief. As the new Lady of House Argyll, Isla quickly learns that this marriage is nonnegotiable and there are certain expectations from her as a wife. Can Isla relinquish her love for this Templar and commit to her new husband or will Angus forsake his vows and save Isla from her loveless marriage?