The last great battle between the Light and the Dark has arrived, engulfing Will Stanton; his ageless master, Merriman; the three heroic Drew children; and Bran, the Welsh boy whose destiny is tied to the Light.

On a quest through time and space that touches the most ancient myths of the islands of Britain, the six heroes fight fear and death in the darkly brooding mountains of Wales. And in the haunting Lost Land, Will and Bran find dream and nightmare, but also achieve the final talisman against the Dark: the crystal sword.

In the dreadful last moment when the Dark rises, all the servants of the Light join to combine the powers of the sword and the six ancient signs. But even with the Signs on their side, can Light prevail?