Harry Potter is spending another tedious summer with his dreadful Aunt Petunia and Uncle Vernon when a group of evil spirits called dementors stage an unexpected attack on Harry and his cousin Dudley. After using magic to defend himself, Harry is visited by a group of wizards and whisked off to number twelve, Grimmauld Place, London. Number twelve is the home of Harry's godfather, Sirius Black, and the headquarters of the Order of the Phoenix. The Order is a group of wizards, led by Hogwarts headmaster Albus Dumbledore, dedicated to fighting evil Lord Voldemort and his followers. The Order is forced to operate in secrecy, outside of the jurisdiction of the Ministry of Magic, which is headed by the dense and corrupt Cornelius Fudge. Fudge refuses to believe that Lord Voldemort has returned.