The three firm friends, Harry, Ron and Hermione, are soon immersed in the daily round of Potions, Herbology, Charms, Defence Against the Dark Arts, and Quidditch. But then horrible and mysterious things begin to happen. Harry keeps hearing strange voices, sinister and dark messages appear on the wall, and then Ron's sister Ginny disappears...
When a letter arrives for unhappy but ordinary Harry Potter, a decade-old secret is revealed to him that apparently he's the last to know. His parents were wizards, killed by a Dark Lord's curse when Harry was just a baby, and which he somehow survived. Leaving his unsympathetic aunt and uncle for Hogwarts, a wizarding school brimming with ghosts and enchantments, Harry stumbles upon a sinister adventure when he finds a three-headed dog guarding a room on the third floor. Then he hears of a missing stone with astonishing powers which could be valuable, dangerous, or both.