After a disastrous summer with the Dursleys, including an encounter with the Dementors, Harry is shunned by friends upon returning to Hogwarts, after the return of Lord Voldemort and no one believes him. He starts his fifth year while new Defence Against the Dark Arts teacher, Professor Dolores Jane Umbridge refuses to teach them defensive spells while refuting Harry's claims of the Dark Lord's return. So Harry sets out, with Ron and Hermione, to start up the D.A, Dumbledore's Army to battle evil forces and prepare the fellow young witches and wizards for the extraordinary journey that lies ahead.