Harry Potter and the Philosopher's Stone summary It started when Professor Dumbledore and Professor McGonagall placed the young Harry onto the doorstep of his aunt and uncle.On his 11th birthday,Harry learned that he was a wizard and that he'll be attending Hogwarts School of Witchcraft and Wizardry.Harry made friends,Hermione and Ron,together they accidentally went into a room that was guard by a Three-Headed Dog that was guarding something very important.Something,that Voldemont,killer of Harry's parents wanted desperately,and everything began.