After getting expelled from yet another school for yet another clash with mythological monsters only he can see, twelve-year-old Percy Jackson is taken to Camp Half-Blood, where he finally learns the truth about his unique abilities: He is a demigod, half human, half immortal. Even more stunning: His father is the Greek god Poseidon, ruler of the sea, making Percy one of the most powerful demigods alive. There’s little time to process this news. All too soon, a cryptic prophecy from the Oracle sends Percy on his first quest, a mission to the Underworld to prevent a war among the gods of Olympus.
As a twelve-year-old delinquent, Percy Jackson thinks he is the most misunderstood teen in the history of the earth.
He’s not, but that’s of no consequence.
Percy sees monsters. And if that isn’t bad enough, he can also interact with them: hear them, and when they get upset, feel every blow as they attack him. Naturally, Percy always fights back. The resulting destruction is always pinned on the boy, since no one else can see the monster’s caucus. Because of this, Percy has a hard time staying in one school.
It was after one of these post battle expulsions that Percy was kidnapped.
He had trudged home, already picturing his mother’s disappointed face when he heard movement from behind him, then an impact to the back of his head sent him into darkness.
He woke up belted to a padded seat. Looking around he saw several other children similarly constrained. Some were trying to pull free, others had given up. The lights around them dimmed, and a projector whirred to life. A semi-attractive woman appeared on the screen, informing the children that they were demi-gods. One of their parents were greek gods. That’s why they can see monsters, occasionally speak fluent greek, and are exceptionally strong for their age. They have been taken to a camp in the middle of a forest to learn to fully utilize their powers, and fulfill their full potential.
After the video ends, many of the children are untied and led away, but Percy and two and tree more are left for a second video. They are all children of the original 6 Olympians, and have greater powers than the rest of the demi-gods. They will be expected to become heroes rapidly. Each of their faces flash on the screen, accompanied by the name of their parent. Percy’s father is Poseidon. All of his swim team trophies suddenly make sense.
So Percy begins to train.
A few days into it, in the middle of Identifying Poisonous Snakes, sirens begin to blare and all of the students are herded into the main hall. A prophesy has arrived from an Oracle. Percy must go talk his uncle Hades to persuade him to release a mortal woman his father is currently in love with, otherwise Poseidon will attack, causing destruction to the earth.
Percy is beamed down to the underworld. He quickly meets Hades, and the god lets him talk with the mortal woman’s spirit. Her name is Lisa. She’s flabbergasted that the handsome stranger that she had been dating was actually Poseidon, and that Percy is his son. He never mentioned any children.
Percy assures her that there are plenty.
Hades is amused by their interactions, and promises to let Lisa go as long as Percy proves his worth by stealing one of Zeus’s lightning bolts.
Through his years of monster attacks, Percy had developed a talent for breaking and entering, something useful since most Janitorial closets are locked, and he always tried to clean up as most as he could before the various building’s destruction was noticed. So after Hades drops him off at the edge of Mt. Olympus, the home of Zeus Percy is able to break into the weaponry, and snatch a lightening bolt. He is spotted leaving, and has to run and hide before sneaking back to Hades.
Hades uses the lightening bolt to zap Lisa’s heart back into beating, then lead her from the underworld back to her body. He promises Percy to never speak of how he received the stolen gift, and sends Percy back to Camp Half Blood.
A few weeks late he gets a letter from Lisa, telling him that things with his father didn’t work out, she wasn’t ready for children, which was apparently all that he was after. Still, she was grateful to Percy for bringing her back to the land of the living, and for her, he is a hero.