To protect Hogwarts, the Ministry of Magic deploys Dementors—phantom, soul-sucking prison guards. These creatures inadvertently torture Harry by forcing him to relive his parents' murders.
The introduction of the Time-Turner in the final act is a brilliant narrative device that elevates the stakes of the story. Rather than creating a convoluted paradox, the time-travel sequence functions as a closed loop. Harry and Hermione do not change the past; they fulfill it. The moment Harry realizes that the mysterious figure who saved him across the lake was not his father, but himself, marks a profound moment of self-reliance and maturity. Found Family and Legacy
Harry Potter, now 13, spends another miserable summer with the Dursleys. After accidentally inflating his awful Aunt Marge, he flees and is taken in by the Knight Bus to the Leaky Cauldron in London. There, he learns that Sirius Black—a convicted mass murderer and loyal follower of Lord Voldemort—has escaped from the high-security wizarding prison, Azkaban. The Ministry of Magic fears Black is coming after Harry.