Thanks to an indiscretion from Hagrid, Harry and his friends work out that the object kept at the school is a Philosopher's Stone, made by an old friend of Dumbledore named Nicolas Flamel. Harry is also informed by a centaur he meets in the forest that a plot to steal the Philosopher’s Stone is being orchestrated by none other than Voldemort himself, who would use it to be restored to his body and come back to power. When Dumbledore is lured from Hogwarts under false pretences, Harry and his friends fear that the theft is imminent and descend through the trapdoor themselves.