Harry Potter is an orphan who was fostered in his aunt's house since childhood and suffered from bullying. But on Harry's 11th birthday, he unexpectedly received an admission letter from Hogwarts Academy. Harry learned from Hagrid, the giant sent by the academy to pick him up, that this is a magic academy, and learned about his life experience. It turned out that Harry's parents were both great magicians, and both sacrificed themselves in the battle against Voldemort, and only Harry survived. After entering Hogwarts, Harry showed an unimaginable talent for flying, and was recommended by Professor McGonagall to join the Gryffindor Quidditch team. On the other hand, Harry discovered that a dark force seemed to be growing secretly in Hogwarts Academy, and the key to solving the mystery was in the room guarded by the vicious three-headed dog. Harry, Ron and Hermione, three good friends, decided to find out.