Blamed for her mother's death, Fionnula is little more than a servant in her father's house, facing a forced marriage. An enchantment allows her to escape...in the form of a glorious white mare. The white mare is irresistible to horseman Brian mac Brandubh, but when he pursues her, he finds Fionnula, who is even more alluring. Under Brian's protection, Fionnula finds peace, but can he help her find absolution for the guilt she bears?