Harry returns to Hogwarts after a lonely summer, only to face a year filled with ill-fortune. Few believe him or Dumbledore that Voldemort has returned, and the ministry intervenes by appointing a new Defense Against the Dark Arts teacher, Professor Umbridge.

Harry Potter and the Order of the Phoenix
A dark conspiracy emerges at Hogwarts as the Ministry of Magic, now controlled by a power-hungry official, turns its attention to Harry and Dumbledore, seeking to gain dominance while the threat of Voldemort's return is overlooked.