Apollo is punished by Zeus, and turned into a mortal.He has to serve Meg, a demigod, and face trials so he can become a god again. He seeks help from Percy Jackson. They run into evil spirits, but get to Camp Half Blood safely.
Apollo has to find what his trials will be, he has to become a god again. Demigods are disappearing without a trace, into the woods. Apollo and Meg need to find a way to restore the Oracle of Delphi.
Apollo and Meg run in the three legged death race. While playing in the labyrinth they enter the chamber of Delphi. They hear a monster, and another man. Meg reveals that the other man, the Beast murdered her father.
Apollo and Meg enter the forest trying to find the missing demigods, and the grove of Dodona(the hidden oracle). While in the woods they run into geyser gods and mymerkeys(giant ants). They find Dodona and the demigods, but they run into the Beast.
“I've found that when one is searching for danger, it's never hard to find.”
Apollo finds out that Meg double crossed him, and that the Beast is her step-father who taught her to fight. They open the grove, but they do defeat the Beast. They help the other demigods, but a new threat --a robotic Beast is destroying camp.
Things can turn out differently Apollo. That's the nice thing about being human. We only have one life, but we can choose what kind of story it's going to be.”
"My other trials will no doubt be long, harrowing, and quite possibly fatal."
The demigods defeat Nero(the Beast) and save Camp Half-Blood. Leo(who disappeared last summer, Who also died and came back from the dead) comes back with his girlfriend-- Calypso--and plans to help Apollo finish his trials, and get the oracles to work again.