So began the fifth year of teaching Harry the school of wizards Hogwarts. But its very sad that almost all the magicians and students deny the return of Voldemort, and behave as if the world is not in danger. The Minister of Magic and head of the educational Department of the Cornelius Fudge, the fear of the head of Hogwarts Albus Dumbledore appoints him assistant Professor Dolores Umbridge, who will conduct lectures on protective magic from the forces of evil. But in practice it turns out that these techniques are virtually useless and powerless. Then on the advice and with the help of his friends Hermione and Ron, Harry takes up independent training of students in methods of protection from the forces of evil. He secretly meets with students of the school who called their society by Dumbledore's army, and prepares them to mortal combat which will in the near future.