Prince Dionysus Serpentarius of the Áes Uisce means to change the world. He has come to the conclusion that the only way to stop the spread of the Erebus lies in shattering the barriers between Light and Dark. To do so, he enlists the help of Phantasia Caelestis, a mysterious young girl with abilities beyond ordinary Sidhe. What Phantasia doesn’t realise, however, is that Dionysus has powerful enemies—and secrets that could irrevocably reshape the world…