Fearing that the Ministry of Magic would take action against him for violating the prohibition that minors are not allowed to use magic outside school, Harry ran away from the Dursleys, but mistakenly took a knight bus to leaky cauldron, and even ran into the Minister of Magic. But the minister didn't investigate his illegal behavior at all, which made Harry feel very incredible. The day before school started, Harry finally knew the reason-Sirius Black, a murderer who committed heinous crimes eleven years ago and was imprisoned in Azkaban Wizard Prison, a loyal follower of Voldemort, recently escaped from prison. Before he escaped from prison, he repeatedly said the same thing-"He is at Hogwarts ... He is at Hogwarts". This makes people firmly believe that his goal is Harry Potter, the "surviving boy" who made Voldemort lose his power.
The express train to Hogwarts started as scheduled, but the students met a horrible creature-dementors on the train. They feed on human feelings of happiness. No matter where they appear, everyone will feel extremely cold and dark around, and feel that all their happiness has been sucked away. When dementors appeared in front of Harry, Ron, Hermione and others, Harry lost consciousness, and his mind rang with his mother's dying cry. ...
The new school year has begun. In order to prevent Sirius Black's invasion, the Ministry of Magic has arranged dementor guards all over the campus. They are also guards of Azkaban prison. Rubeus hagrid, the gamekeeper, has been cleared of his charges and has become a teacher in the course of protecting magical creatures, but his first class was not smooth: Draco Malfoy of Slytherin College was sent to the hospital because he provoked Buckbeak, the winged Gryphon that Hagrid brought to class, and his arm was scratched. He was determined to use his father's influence in the Ministry of Magic to make Hagrid pay the price. Harry, Ron and Hermione are worried about this. Hermione faced another problem: she took all the courses, and there were three courses on her schedule at the same time, but she didn't miss any of them. Ron feels incredible about this, but Hermione seems to refuse to disclose it.
As in previous years, the course of Defense Against the Dark Arts has welcomed a new teacher, remus lupin, who is haggard and ragged. He exposed the students to many novel magical creatures and taught them spells to fight them. Harry learned that he was the wizard who drove away dementors on the train. During the break, the students talked about the latest news of Sirius, the murderer. Harry was not interested in this, but the prediction made by divination teacher sibyll trelawney that the ghostly big dog wandering in the cemetery was "ominous" shook Harry's heart, because he met it that night. Then, Harry saw the big dog in the quidditch stadium in the storm-this time, around him, there were hundreds of hungry dementors ... Harry fell off the broom and fell to the ground under the great mental impact. Fortunately, Professor Dumbledore saved Harry with the slow drop spell.
In this game, Harry suffered a fiasco in Gryffindor's school, and his broomstick "Nimbus 2000" was blown to pieces by the storm near whomping willow. In order to protect himself from dementors, Harry asked remus lupin how to repel dementors. Professor Lu bang promised to teach him to learn the patron saint spell after Christmas. The day before the holiday, Harry put on his father's invisibility cloak and went to Hogsmeade with Ron and Hermione with the help of the marauder's map given to him by Fred and George (Harry failed to get permission from Uncle Vernon to go to Hogsmeade because he got into trouble during the summer vacation). But there, they happened to meet the teachers and the Minister of Magic, and heard the amazing inside story-Sirius Black is Harry's father, James Potter's best friend and Harry's godfather, but he betrayed Zhan Mu and revealed the hiding place of the Potter family to Voldemort, which made Harry's parents suffer the disaster; After that, they brutally killed another close friend of theirs, peter pettigrew, who was also one of the insiders. Now he's coming to get rid of Harry ... Harry's chest is burning with hatred. After Christmas, Professor Lu Bang and Harry started the training of the patron saint spell as agreed. Harry's magic has achieved initial results, but it is not strong enough. His patron saint can only appear in the form of mist Although this is excellent for a thirteen-year-old wizard, Harry can't get over it. During the training, he learned that Professor Lu Bang was also a good friend of Harry's parents and peter pettigrew, but Professor Lu Bang didn't want to reveal more. At the same time, Harry and his classmates found that Professor Lu Bang seemed to be absent every once in a while because he was weak. In a substitute class of Professor Snape, who Harry hates most, he asked the students to know about werewolves in advance, which caused a lot of complaints from the students, but Snape seemed to have ulterior motives. ...
During this time, the friendship between Hermione, Harry and Ron has experienced many twists and turns. First of all, Harry received a brand-new broom sent to him anonymously at Christmas-"Firebolt". Hermione reported this to Professor McGonagall, the dean of the college, because she suspected that the broom was probably sent by Sirius to hurt Harry. Professor McGonagall took the broom away for safety inspection, which made Harry and Ron very unhappy. When the broom returned safely, Hermione's pet cat Crookshan stabbed again-the cat hair it left on Ron's bed seemed to prove that it had eaten Ron's favorite pet, the mouse. Ron and Hermione fell into a cold war. At the same time, the anxiety in the school is also spreading-despite the terrible dementors and conscientious teachers, Sirius Black successfully sneaked into Hogwarts twice in a row and once appeared at the bedside of sleeping Harry and Ron! No one knows exactly how he broke in, and the whole school was in a panic.
On the other hand, rubeus hagrid himself was not retaliated, but his beloved Buckbeak was sentenced to death by the Ministry of Magic. In order to help the careless Hagrid defend Buckbeak, Hermione rummaged through all the relevant books in the library to collect information, but she was tired of the heavy homework, but she was exhausted. Seeing this, Ron finally decided to put aside his resentment and get back together with Hermione to help her get rid of Harry. However, they can't appear in court in person instead of Hagrid, and Draco Malfoy's father is in the way, so Buckbeak's death seems to be a foregone conclusion. Before the three men could grieve, another attack appeared-Ron, who had just found his mouse, was bitten by a big black dog and dragged into the mysterious passage under whomping willow. ...
When Harry and Hermione finally found them through the passage, the big dog had changed back to human form. It was Sirius Black. After a fierce struggle, Harry, Ron and Hermione finally subdued Blake. Harry struggled between hatred and reason, but the sudden appearance of Lu bang interrupted all this: he disarmed three people, pulled Sirius up and hugged him tightly ... then he made Harry, Ron and Hermione listen to him and let him tell all the truth. Sirius is innocent; Peter Pettigrew is still alive. He has become a mouse, and he is the culprit who betrayed Harry's parents and planted it on Sirius. The three men finally believed him, but Harry refused to let him and Sirius kill Peter because he believed that his father didn't want his best friend to be swallowed up by the desire for revenge.
Everything seems perfect: the real killer has been found, Sirius is about to be washed away, and it is possible to live happily with Harry. However, all these good wishes were dashed by Lu Ping's sudden outbreak in the moonlight. Peter pettigrew takes advantage of the chaos to escape, Ron is stunned, and Sirius distracts Lu Bang, who becomes a werewolf, but is exposed to the clutches of hundreds of dementors. However, seeing that there was no way out, a mysterious figure of deja vu suddenly appeared on the other side of the lake-he summoned a shining stag, dispelled all the dementors and saved Harry, Hermione and Sirius who were dying. Harry had a question before he went into a coma: Is that man his father?
When Harry woke up, he and Hermione had been sent to the school hospital, but Sirius was arrested, waiting for the dementors' final disposal. Professor Dumbledore hinted that Hermione used her time converter to save Buckbeak and Sirius with Harry three hours ago. When she and Harry rushed to the other side of the lake and saw dementors sucking the souls of Harry and Sirius, Harry suddenly realized that the mysterious figure was none other than himself. Through this belief, he finally summoned a complete and powerful patron saint of stags. Finally, he and Hermione rode Buckbeak, went to the high-tower cell of the school, and rescued Sirius. Although peter pettigrew is still at large and Sirius has not been proved innocent, at least he is free. He took care of Harry like his own father (firebolt was indeed from him), and Harry felt sincerely happy and satisfied. Once the Dursleys knew that Harry had a murderer as a priest, they never dared to abuse Harry again this summer. Although Trelawney's true prediction at the end of the semester that "Voldemort's servants will return to him before midnight to help him regain his strength" still bothers him, let him be an ordinary teenager and welcome his summer vacation happily. ...