The Ministry of Magic's Law Enforcement Division has set up a prison on an island in the cold waters of the North Sea, where it is used to hold wizards who have committed grave crimes. It is known as Azkaban Castle or simply Azkaban.

It was a terrifying place because it was guarded by Dementors, a horrible group of creatures known as 'Soulless Demons'. They feed on people's positive feelings. Once the prisoners are kept in captivity for a certain period of time, they lose all their faith and good feelings and thoughts. The darkest and most terrible memories kept reappearing in their minds, they went insane, screaming in their sleep, shouting all sorts of things, hunger strikes, going mad, losing the courage to live. There are many poor people who have died tragically in this terrible prison on an isolated island. Even if they escape, their spirits, health, and youth will be drained by this terrible place, and they will definitely not have a few days to live.

However, since its inception, there have never been rumors of a successful escape, so it has become a place of conversation among wizards. If the Daily Prophet were to rank the things that wizards feared, Azkaban would undoubtedly be firmly in second place, just below 'that man'.

The July wind blew the Mediterranean hot, but Azkaban was always so cold that the guarding Dementors stopped at one of the cells from time to time to give the prisoners an "affectionate" kiss, sucking away their fond memories and the energy they had so hard to build.

More than a decade ago, Voldemort disappeared, some say he died at the hands of Harry Potter, and the once-powerful Death Eaters became the target of everyone's shouting, and some of them were arrested and imprisoned in Azkaban by the Ministry of Magic without trial. Sirius Black was one such one, but there was no one in his cell, only a large black wolfdog with a not very good coat. Lying languid on the cold stone slab, its eyes were filled with human sadness and an indescribable remorse.

"Click, click......" It was the sound of boots stepping on a puddle in Azkaban, and the Dementors wouldn't clean up the prisoners, they just wanted the prisoners to live longer, or more prisoners. So moss covered the walls of the cell, the sea breeze brought abundant moisture to Azkaban, and the fishy smell reminded every criminal: don't try to escape!

Dementors also don't wear human boots, they are light and walk floating. Then it's the people who come.

The black dog in the cell, looking up alarmedly, in Azkaban, the concept of time can only be measured by two meals a day. A shadow dragged on the mossy walls in the trance light of the hallway. It begins to change, which can be clearly distinguished, it is the dog that stands up on two hind legs, then elongates and gradually transforms into a human form.

This is the person the dog becomes, or rather the man who becomes the dog. His hair was long and loose, wet, and you could see that his eyes were as vicissitudes as a black dog under his hair.

The man who had slipped the newspaper through the bars of his cell, apparently not wanting to stay longer in Azkaban, shoved the newspaper in, swept Blake, who was still alive, and hurried away again. It was Fudge, the current Minister of Magic, who was inspecting Azkaban and promoting legal education by the way.

Blake picks up the newspaper, hoping to see Harry Potter, his brother's son, in the paper. A year ago, when he was in legal education, he happened to see him and a man named Luo in the "Prophet Daily...... Yes, it's a photo of Lockhart, a newcomer from Azkaban, who was also locked up here not long ago.

Although Blake hated the bad things he had done to Harry, Lockhart was also said to be a fan of Voldemort and took advantage of the Defense Against the Dark Arts class to plot against Harry. But he got Harry in the newspapers, and that's something to be thankful for. To this day, the newspaper was still properly tucked away by Blake in his only dry and tidy corner, and he took it out from time to time.

Since then, legal education has become what Blake looks forward to the most, it is the only opportunity he can communicate with the outside world, and he hopes to see the news about Harry again, as long as he grows up safe and healthy, everything will be fine.

Blake flipped through the front page of the Daily Prophet expectantly, this time the newspaper didn't have the things he wanted about Harry, but he didn't throw it aside.

Blake clutched it tightly, his eyes fixed on one page: the staff of the Ministry of Magic had won the prize, and Arthur Weasley, director of the Department for the Prohibition of the Misuse of Muggle Objects at the Ministry, had received the Galleon Prize, the Daily Prophet's annual award. An elated Mr. Weasley told the Daily Prophet reporter, "We're going to spend this money on summer travel to Egypt." Our eldest son, Bill, was in Egypt doing spell-breaking work for Gringotts. "The Weasleys will be in Egypt for a month. Come back before Hogwarts school starts. Currently, the Weasleys have five children attending school there.

Blake was staring at the photo of the event. He saw the nine Weasleys standing in front of the pyramid, all waving to him with smiles on their faces. Mrs. Weasley was small and fat, but the balding Mr. Weasley was very tall, and a boy of thirteen or fourteen years old was standing in the middle of this photo, tall and thin, with his pet rat standing on his shoulder and his arm around his sister.

Blake looked at the mouse, its front paw missing a finger! Listening to Fudge's footsteps go farther and farther away, Blake turned back into a black dog, silent......

During the night, he had a dream. In the Hogwarts dormitory, a mouse suddenly transforms into a human form in the moonlight, a diminutive man with a sinister smile on his face, lifts Harry's bed and slits his throat with a dagger—

"No!" Blake was awakened from his dream, but nightmares were common in Azkaban, and there were no Dementors to quiet him.

This dream made Blake decide to escape from prison, he would not let the dream come true, and he could not let Harry have an accident.

On this day, the Dementors delivered dinner on time, and Blake stuffed as much food as he could into his stomach, which might be his last meal in the next few days.

Late at night, the last class of Dementors patrolling Azkaban, Black is in action. He had slipped a moss-rubbed ball into the keyhole while the Dementors were delivering food. This way, if the Dementors don't pay attention when locking the door, the chains on the fence won't actually lock.

Blake took the two newspapers with Harry and the mouse, moved the lock, and quietly opened the door, outside with nothing but nightmare screams. He transformed into the black dog, and strode towards freedom against the fishy sea breeze.