The Hero of Olympus, defeater of Kronos, Gaia and thousands of monsters, has been betrayed by everyone he loves and cares about and decides to leave home. Once he left, Chaos appeared to him and offered him to become a angel and the commander of his army. Now, after 1000 years being on planet Chaos, a new threat has arisen and Percy and his army have been summoned back to Earth. What will Percy do when he returns and will they win the war?