Disclaimer: I am not J.K. Rowling, and therefore, I do not own Harry Potter or any of its characters.
Harry woke up while it was still dark. He was extremely excited, though. They were leaving the Leaky Cauldron that morning to go back to Hogwarts, for third year. He got up and got dressed, unintentionally bumping into a post on the bed and into the wardrobe.
"Oops," he said.
After a while, he headed downstairs to find Ron and Hermione bickering about how Crookshanks, Hermione's new cat, was a hazard to Scabbers, Ron's rat. Harry rolled his eyes and sat down to eat some breakfast. After everyone had eaten, Mr. Weasley pulled him aside.
"Harry," he started. "What do you know about Sirius Black?"
"That he escaped from Azkaban and is trying to find me," Harry replied.
"That's right!" Mr. Weasley exclaimed. "Molly and I want you to be very careful this year. Don't go looking for trouble, don't bring more attention to yourself than you already have."
Harry nodded in reply, and went to go collect his things. They took a Ministry car to King's Cross, and unlike the previous year, everyone made it through the barrier. They got onto the train, and the trio found a compartment where a man was sitting, asleep.
"Who the bloody hell is he?" Ron asked.
"Language, Ronald," Hermione said. "And he's Professor Remus J. Lupin."
"How'd you know that?" Ron asked her.
"It's on his suitcase," she replied, rolling her eyes.
"Oh," Ron said.
"So Harry," Hermione said, turning to her other friend. "What did Mr. Wesley talk to you about earlier?"
Harry explained to them the story of Sirius Black. Some while later, the sky darkened and the train stopped. A floating black cloaked thing appeared at the doorway, and came inside. Harry heard a scream, and then his world went black.
When he woke up, the man from before was peering down at him, holding a chocolate bar.
"Ah, Harry," he said, helping him back up on his seat. He broke the chocolate bar into pieces and handed him one. "Eat it, you'll feel better."
Harry nodded and took the sweet, nibbling on it thoughtfully.
"What was that thing?" Harry asked.
"That," Professor Lupin answered. "Was a Dementor."
"Oh!" Hermione exclaimed. "I know about those. They guard Azkaban!"
Professor Lupin nodded and stood up.
"Smart one," he said. "If you'll excuse me, I must have a word with the driver."
He walked off. Harry's eyes followed him for as long as they could, but then they began to droop.
"Are you okay Harry?" Hermione asked, worry shining in her eyes.
"Yes," he replied. "Just tired. I'll be fine when we get to Hogwarts."
She nodded. When Harry woke up again, they were at Hogwarts.
That's the end of this chapter. I hope you enjoyed it. The next few chapters probably won't be as close to the plot as this one was. Please review what you thought.