Greyson is a green-eyed misfit, teased all through his childhood for being some sort of demon, the only kid without brown eyes. Now 19, Greyson travels to the Kingdom of Viæden, an ancient and secluded realm where trees grow to be seven miles tall. There, he discovers his eyes mean that he is a vertui: something more than human, destined to play a major role in the fate of the world. But will it be for good? Or evil?