Danny Heron, a fifteen year old with much more to his past than even he knew, inherits a very special and powerful stone necklace for his birthday. But it brings him much more than a fashionable accessory. According to Tory, a teenage immortal who appeared in his room in the middle of the night, this stone is the source of power for all Light and Dark in the universe. Light and Dark battle endlessly, both wishing to attain the Stone, but unlike humans have been led to believe, the Light is evil.
Tory and Danny race across the world, fighting Lights and mortals, trying to find the leader of the Dark society. They must reach him in time to destroy the Stone and defeat the Light, but to do so, it requires a great sacrifice by Tory.