The god Apollo falls from the sky directly into a couple of trash cans – he has fallen out of favor with Zeus and has been stripped of his immortality as punishment! Soon, he is also ambushed, but luckily, Meg comes to his aid – sassy, eager for a fight, at most twelve years old, and undoubtedly a demigod. Together, they set off to Camp Half-Blood, but more dangers await them there. To make matters worse, the Oracle of Delphi is no longer functioning, as it is still occupied by Apollo's old enemy, Python...