In "Harry Potter and the Chamber of Secrets," the second book in the Harry Potter series by J.K. Rowling, young wizard Harry Potter returns to Hogwarts School of Witchcraft and Wizardry for his second year. He discovers that the school is plagued by mysterious attacks, leaving students petrified. As Harry investigates, he learns about the legendary Chamber of Secrets, said to house a monster that can only be unleashed by the heir of Salazar Slytherin. With the help of his friends Ron Weasley and Hermione Granger, Harry uncovers the truth and confronts the monster to save his school.