Harry Potter and the Chamber of Secrets
While at home for the holidays with the Dursleys, Harry Potter receives a visit from the elf Dobby who gives him dire warnings of what might happen if he returns for the next term at Hogwarts. Harry ignores these, but once back at Hogwarts sinister things begin to happen - warnings are left written in blood that the Heir of Slytherin has returned and that the Chamber of Secrets has been opened, while people about the school are being petrified. Investigation reveals that the Chamber of Secrets, hidden somewhere in the grounds of the school, purportedly contains a monster that, when released, will destroy all those who are not pure-born magicians. Circumstances have both Harry and Hagrid blamed for the petrifications. And so Harry and his friends set out to solve the mystery of the Chamber of Secrets and find the identity of the Heir of Slytherin.