As Elynn finally discovers a way to save her sister from the annual offering, she finds herself in the brutal world swarming with accursed beasts, serving the queen of one of five realms. If she wants to survive, she must follow the rules.

She must not disobey.

She must not be curious.

And she must not reveal that she is not sixteen-her sister she's pretending to be.

But following the rules is a challenge for someone like Elynn who finds it hard to tolerate injustice, keep questions to herself and mind her own business instead of satiating her curious nature. Every unfair act makes her blood boil. With every day spent in the oppressive environment, her hope withers. And blinded by the promise to avenge them all, her sanity turns fragile.

And as she thinks her current situation could not get any worse, here comes the world's most feared monster who knows Elynn's secret, and not only that.