In the realm of Aronmore, seventeen year old Aodhan Murphy succeeds his father as laird of his clan after his recent death. Whilst juggling his newfound responsibility and his marriage to his childhood sweetheart, Bridget, Aodhan is gifted with the long lost sword of the kings of Aronmore and has a vision urging him to enter the mysterious Síoraí Forest, home of the Goddess of Light.

In neighbouring kingdom Riohdan, brilliant young swordsman William Robinson Beckwith is summoned to the capital to meet with King Nicholas and is sent on a secret mission into The Síoraí Forest to retrieve a magical artefact for his king.

Meanwhile, in the shadow of the king, stands the enigmatic Lady Isabelle. Is she simply a faithful servant? Or does she have a greater part to play?