The Lightning Thief is narrated in the first person past tense by Percy Jackson, a twelve-year-old diagnosed with dyslexia and ADHD. On a school trip to the Metropolitan Museum of Art, one of the chaperones, Mrs. Dodds, turns into a Fury and attacks him. The other, Mr. Brunner, lends Percy a magical sword-pen to defeat her. After school lets out, Percy goes on a trip to Long Island with his mother, Sally. In the middle of the first night, Percy's friend Grover Underwood, who is actually a satyr, tells them they are in danger, and the three drive to a mysterious summer camp. The Minotaur attacks them, grabs Mrs. Jackson, and causes her to disappear in a blinding flash of gold light. Believing his mother has died, Percy kills the beast with one of its own horns, then drags the unconscious Grover into the camp, soon falling unconscious himself. Percy wakes up three days later and learns 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 Castellan and Annabeth Chase. After a hellhound attacks him during a game of Capture the Flag, Percy is claimed by his father, the god Poseidon. The activities director Chiron explains to Percy how the three eldest male gods—Poseidon, Zeus, and Hades—swore an oath not to have children more than 70 years ago; Percy represents a violation of that oath. This, coupled with the fact that Zeus's master lightning bolt has recently been stolen, has bred much suspicion between the gods.