Following the tragic deaths of his parents, the king and queen, Nyx has been living in isolation and presumed dead. While enemies hunted him to deny his rightful claim to the throne, he remained hidden for twenty long years. His forced exile is shattered when his rebellious childhood friend, Bo-inn, stumbles upon him in the mountains. She is shocked to discover that Nyx is very much alive.
Nyx learns that the realm is controlled by monsters in the Court of Scathe. At long last, he returns to the Moon Court and confronts the mysteries of his past and unravels the darkness threatening to consume their world. Despite Nyx and Bo-inn growing closer, they are once again torn apart by the Fates. As alliances are forged and secrets are revealed, Bo-inn must honour a promise made long ago with the enemy, while Nyx is forced to face his own fate.