Calla has no memory of her childhood except for some hazy, recurring nightmares. But she doesn't really mind. As a servant in Kiriong, the picturesque terrace-garden home to the Hennans, one of the most influential families in the radiant Kamphua Dominion, she's content to live a simple life, untouched by the troubles of the world. As long as no one finds out about the forbidden magic stirring under her skin. When the estranged first-born son of the family, Gray - a magic-user himself in servitude of the Queen - returns home while tracking a runaway mage, the secret Calla has kept to herself for so long threatens to break to the surface. And as the turbulent tides of long-forgotten magic draw the two of them together, she finds it harder and harder to deny the power inside her. But Gray knows more than what he admits. And although in the aftermath of a vile political plot targeting him, finding out what happened to Calla in those forgotten years might be their only chance to survive, that knowledge could break them both. It could break the entire world.