The Heroes of Olympus follows a prophecy first revealed in The Last Olympian, foretelling that seven demigods must unite to prevent the rise of Gaea, the ancient Earth goddess who is awakening and threatening to destroy the world. As chaos builds across both mortal and mythological realms, demigods from two rival traditions - Camp Half-Blood, home of the Greek demigods, and Camp Jupiter, the Roman counterpart - are forced to confront not only external danger, but also the deep mistrust between their cultures. What begins as uncertainty and division gradually becomes a fragile alliance built on shared destiny.
The core group of seven demigods - Annabeth Chase, Leo Valdez, Percy Jackson, and Piper McLean from Camp Half-Blood, alongside Jason Grace, Frank Zhang, and Hazel Levesque from Camp Jupiter - must learn to trust one another while navigating quests that span land, sea, and mythological worlds. Alongside them are key figures such as Nico di Angelo, the son of Hades struggling with identity and fate; Reyna Avila Ramírez-Arellano, the disciplined Praetor of Camp Jupiter; and Gleeson Hedge, a fiercely loyal satyr protector. Together, they face trials that test their loyalty, courage, and identity as they race to stop Gaea’s awakening before the world is consumed.
