The gates to Tartarus have been opened and Kronos is now destroying the world. The only way to stop him is to find the legendary Scythe of Kronos. As Chrys is searching for the weapon, Huntley must convince Hephaestus to create a new lock for Tartarus. Hephaestus, however, holds some grudges against the gods, and the goddess who has the Scythe isn't letting go of her treasures. On top of all this, Aether has made his move to try and become King of the Gods. Will Chrys and friends be able to stop Kronos and Aether? Or will the worlds be forever changed? This is the last book in the Queen of the Underworld duology.