To save his kingdom, Welsh king Maelgwn the Great is forced to wed the daughter of his most hated enemy. To his surprise, Brigante princess Rhiannon's enigmatic beauty inflames his passion, and her gentleness soothes his grieving heart. But before their love can truly blossom, a terrible secret tears them apart and sends Rhiannon fleeing. To escape the curse of his past, Maelgwn must follow Rhiannon deep into the perilous twilight realm between life and death and there pursue the elusive dream of a love that will heal their tormented spirits.