Percy Jackson is pretty ordinary for a 12 year old. Besides the ADHD and dyslexia, he's normal. Or almost as normal as a son of Poseidon can be anyway. Expelled from almost every school he has ever been to, he has no reason to think Yancy Academy is any different. A school trip changes everything as his teacher, Mrs. Dodds, turns into one of the three Furies straight out of Greek legends and attacks him. After being saved by his Latin teacher, everyone forgets Mrs. Dodds, Percy learns that his closest friend is a Satyr and that he is the son of Poseidon, the Greek God.
With barely any time to come to terms about his demigod status, Percy faces dangers and wonders from the old books, not being able to believe what he is experiencing. He has no time though, blamed for stealing Zeus's lightning bolt, he needs to clear his name before Zeus manages to find him. And to do that he needs to find the Lightning Thief.