Percy, Annabeth and the other survivors who fought in the Battle of Manhattan are forced into Celestial bronze chains, the ones that prevent them from using their powers. The gods and their allies have been defeated. Sitting atop what used to be Zeus’s throne, is the Titan Lord himself. Kronos. He smiles sinisterly. Monsters force them all to kneel before Kronos.

“I told you, Perseus Jackson, you cannot stop me. Now you and your petty friends shall be made slaves to the Lord of Time!”