Percy Jackson is a twelve-year-old boy with dyslexia and ADHD from New York City.[P 1] While on a school trip to the Metropolitan Museum of Art, one of the chaperones, Mrs. Dodds, turns into a Fury and attacks him.[P 2] Percy's favorite teacher, Mr. Brunner, later revealed as Chiron, lends Percy a magical sword-pen to defeat her. After the school year ends, Percy's mother Sally takes him to Long Island. Percy's friend from school, Grover, reveals himself to be a satyr and warns of danger. At a summer camp, Sally is attacked by the Minotaur and disappears in a flash of light. Percy kills the beast with one of its own horns. He learns that the camp is called Camp Half-Blood, and that he is a demigod: the son of a human and a Greek god. He settles into camp life and meets several other demigods, including Luke and Annabeth. After a hellhound attacks him during a game of capture the flag, he is saved by Chiron and then claimed by his father, the god Poseidon. Chiron explains to Percy how the three eldest male gods—Poseidon, Zeus, and Hades—swore an oath not to have children; Percy's birth was a violation of the oath. He is the second violation of the oath, as the first was Thalia, daughter of Zeus. She was killed by monsters sent by Hades. This, coupled with the fact that Zeus's master lightning bolt has recently been stolen, has bred much suspicion between the gods.
Percy is sent on a quest to locate Zeus's lightning bolt. Annabeth and Grover accompany him to the realm of Hades, who is believed to be the most likely culprit. Percy brings Chiron's magic sword Anaklusmos and Luke's flying sneakers. The trio travels to Los Angeles to visit Hades. Along the way, they are attacked by the Furies, Medusa, Echidna, and the Chimera. They perform a favor for the god Ares, who gives them a backpack full of supplies and safe transportation to Nevada, where they are stalled by the Lotus-eaters. Percy learns more about his companions, his powers, and the world of the Greek gods. In Hades's realm, Grover is nearly dragged into Tartarus by Luke's flying shoes. The battered group finally meets Hades, who reveals that his Helm of Darkness has also been mysteriously stolen, and accuses Percy of stealing it. Hades threatens to kill his hostage Sally and reanimate the dead unless his helm is returned. When Percy finds the missing master bolt inside Ares's backpack, the group realizes they've all been manipulated by Ares. After they narrowly escape the Underworld, Percy meets Ares again on the beach and challenges him to a duel. After a long and tough fight, Percy wins, and he gives the Helm of Darkness to the Furies. Hades realizes that Percy is not the thief of the helm nor the master bolt, and returns Sally home.
Percy takes the master bolt back to Zeus on Mount Olympus, and also meets his father Poseidon there. Percy returns to Camp Half-Blood as a hero and enjoys the rest of his summer. On the last day of camp, however, he goes into the woods with Luke, who reveals himself to be the real thief of Hades's Helm and Zeus's bolt, following the orders of Kronos. Kronos had manipulated the power-hungry Ares into taking part in the scheme. Luke explains his beliefs that the gods are too irresponsible and are poor leaders who need to be overthrown. He offers Percy the chance to join him, and when Percy refuses, Luke tries to kill him with a scorpion. Percy is stung and faints. When he wakes up he is given a choice to stay in camp or go home for the school year. He decides to spend the school year with his mother. Grover and Annabeth also leave the camp.[1][5][6]
