Harry Potter and the Chamber of Secrets is the second novel in the Harry Potter series by J. K. Rowling. The plot follows Harry's second year at Hogwarts School. He and his friends will face new challenges. It seems that the chamber of secrets has been opened again, mysterious messages about the heir of Slytherin appear on the walls, and a series of mysterious attacks on the school's students take place. The main characters are to sort things out and face the danger.