Harry is banished to his room while Uncle Vernon hosts important clients. A house-elf named Dobby shows up in Harry’s room with the warning that terrible danger awaits at Hogwarts and not to return there. Harry refuses to believe him, but is locked in his room. He is rescued, however, by the Weasley brothers in a flying car. So Harry returns to Hogwarts despite Dobby’s warning. Sure enough, Harry begins hearing an evil voice that nobody else seems to hear. The dreaded Chamber of Secrets is open again at Hogwarts, and the unknown Heir to Slytherin is determined to wreak havoc on Muggle-blooded students. As students become petrified, Harry and Ron have to act.