Uranus and Gaea have for many years seen in frustration as the Olympians made the Earth rot. They knew that their son Kronos was too bitter to rule again, but back in the golden age there was no disease, hunger, or killing. Gaea first tried to get rid of them with the Giants, but that didn't work, and her children were just branded evil in the end. Now with her husband on board, she will give birth to a new breed of immortals, the Colossi, and their emperor, Perseus Jackson.