They visit Luke, who gives them a map showing the location of three pearls belonging to Hades' wife, Persephone, which they can use to escape the Underworld. Defying Chiron's orders, Percy decides to go to the Underworld, joined by Grover and Annabeth. After winning a Capture the Flag game, Percy is visited by a fiery apparition of his uncle Hades, who reveals that Sally is with him in the Underworld and that he will return her safely if Percy hands over the lightning bolt. He also meets other demigods, including Annabeth Chase, daughter of Athena and Luke Castellan, son of Hermes. Percy begins training to use his demigod powers, which include water manipulation and using water to heal. Chiron suggests that Percy go to Mount Olympus to convince Zeus of his innocence. Brunner is the centaur Chiron, also initially disguised. He learns that he is the son of Poseidon, that Grover is a disguised satyr and his protector, and that Mr. Three days later, Percy wakes up in the camp. Percy kills the minotaur with its own horn, then faints from shock. Grover tells Percy to use the pen, and Percy discovers that it is a sword, which he uses to fight the minotaur, without initial success. However, the three are attacked by a minotaur that appears to kill Sally, who is unable to enter the camp. Brunner gives Percy a pen, tells him it is a powerful weapon, and has Grover take Percy and his mother Sally to Camp Half-Blood, leaving behind Sally's husband Gabe Ugliano. Upon learning of the Fury's reason for the attack, Mr. Brunner - both of whom appear disabled - help Percy and scare off the Fury. Percy's best friend, Grover Underwood, and his Latin teacher, Mr.
While on a school trip to the local museum, Percy is attacked by a Fury disguised as his substitute teacher, who demands the lightning bolt. Percy is a sixteen-year-old teenager who appears to be dyslexic, but has a unique ability to stay underwater for a long time. Poseidon reminds him that Percy is unaware of his true identity, but Zeus declares that unless his master bolt is returned to Mount Olympus before the next summer solstice, war will be waged. In New York City, Zeus and Poseidon meet at the top of the Empire State Building, where Zeus reveals that his master lightning bolt has been stolen and accuses Poseidon's demigod son, Percy Jackson, of the theft.