End
Once Percy, Annabeth, and Grover enter the underworld they are greeted by Hades who offers Percy a deal. Hades offers Percy his mother in return for Zeus's powerful Lightning Bolt so that he can take over Olympus and be in control. Percy tells Hades that he never stole the Lightning Bolt and came to Hades only for his mother. Hades outraged threatens to kill Percy's mother by letting him think that he has saved his mother reveals the Lightning Bolt that Luke put inside of Percy's shield that Luke gave him to frame Percy. Hades is now joyous about his new opportunity to finally take over Olympus is finally coming true. Percy knocks the bolt out of Hades hand and knocks Hades unconscious.
Percy returns the Lightning Bolt back to Zeus and Olympus has been saved of anarchy. Percy's mother is saved and is given all of the glory for saving Olympus at camp half blood. Luke flees away so that he isn't caught for attempting to frame Percy.