In the aftermath of a nasty case of hepatitis, Will Stanton has temporarily forgotten his mission from the Light: to recover a golden harp, with the help of the "raven boy" and "silver eyes that see the wind." When his family sends him to Wales to recover from the illness, he regains his memory when he meets an albino boy his own age named Bran -- which means "raven." Bran's mother "Gwenny" vanished many years before, and his stepfather has devoted himself to religion and penitance. Bran's only friend is the silver-eyed dog Cafall.
Will acquaints his new friend with more information about the battle with the Dark, while Bran acquaints him with information about Wales that can help Will find the golden harp, and wake the Sleepers under the hill. But the malevolent Grey King is spying on them with magical warestones and trying to wrest the harp from Will. To stop the Grey King, Will must learn the secret of Bran's past and evade the dangerous farmer Caradog Pritchard.
Here the Arthurian theme, which has been present in a smaller way throughout the series, becomes more pronounced and integral. Cooper continues interweaving mythic elements into it, such as the Sleepers, Cafall the dog, and the Brenin Llwyd. Fans of mythology and other mythic-themed stories such as the Prydain Chronicles will have a heyday.