"Let's go in," Harry whispered to Hermione, and they walked into Sirius's rented room together.

But there was already someone in the room.

Harry stared at the unshaven stranger in front of him, with a messy head of ginger hair, looking like Crookshanks after rolling in the mud. He swaggered against the sofa, one of his short bowed legs lazily resting on the table, as if he was asleep.

"Who are you!" Harry and Hermione drew their wands at the same time.

Crookshanks lay on the ground and made threatening noises.

The man in the tattered coat was awakened, he turned over and sat up, looked up and saw a sparking wand against his neck, he raised his hands obediently in surrender.

"My name is Mundungus Fletcher, and I'm entrusted by Dumbledore to protect you," said the short and fat man.

"You're lying," Hermione said sharply, "How could Dumbledore send you, someone like you--"

Mundungus looked at her aggrievedly. "What's wrong with me? I work for both Dumbledore and Hap, and I joined the Order of the Phoenix more than a decade ago..."

"But why are you here? This is the house rented by Sirius." Harry asked, while continuing to point his wand at the man.

"He asked me to come, and he can't leave now." Mundungus leaned back cautiously.

"So you are the one who came to inform me to leave early?" Harry's eyes widened, "But you didn't do anything, but slept here." He said angrily, just because the information didn't match, he almost misunderstood Hermione.

Mundungus pointed to his slack and bloodshot eyes, "Look at me, I just finished a big thing, I'm so sleepy that I can't open my eyes. It was still early when I came, thinking I'd sleep for a while... I didn't expect you to come here by yourself." "Were you busy

with the Order of the Phoenix before?"

"Almost." Mundungus said vaguely.

"But weren't you ordered to protect Harry?"

"Ahem, there is a temporary mission..."

Harry and Hermione looked at each other, and they felt that this guy was very suspicious and his eyes were sneaky.

"Since you are the one sent to inform Harry, then you, um, should know where we are going?" Hermione asked.

"I can't tell you the specific address, at least not now, we have to wait until--" Mundungus said, he waved his hand, "Wait, don't be impulsive, it's the Black House!"

Harry and Hermione put down their wands.

"How to leave from here?"

"Through that," Mundungus pointed to the fireplace, "Floo Network."

"What time?"

"Seven o'clock, and there is another person to wait for. He has a note in his hand." Mundungus muttered, "Don't ask me, I don't know who it is."

Harry and Hermione looked at each other, they almost guessed who it was.

"What is the note you mentioned just now?" "

The specific address written by the secret keeper is used as the key to the Fidelius Charm." Mundungus explained, "The place we are going to is cast under the Fidelius Charm. After the spell is cast, no one can reveal this address to the outside world, and outsiders can't find it at all. Only the secret keeper has the right to decide who to reveal the secret to. When the time comes, we will have no worries when we talk again."

Harry and Hermione temporarily believed his words, but necessary questioning was still necessary.

"Are you familiar with Sirius?" Harry asked.

"Of course, I often borrow the fireplace here. It's safe and hidden! And it's not supervised by the Ministry of Magic!" Mundungus said.

"Not supervised?"

"Yeah, I guess the Black family must have paid a lot of price to get this technology back then. Just think about it, if I also mastered it, I could set up secret bases all over the world. How convenient it would be! And I can perfectly avoid the Ministry of Magic of various countries!" Mundungus said proudly, praising his grand plan.

Unfortunately, the plan was stuck at the first step.

"Mr. Fletcher--"

"Just call me Mundungus, little girl, I'm not a noble person." Mundungus scratched his unshaven chin and said.

"Well," Hermione paused, "I heard that connecting to a private fireplace requires the owner's permission-and unless there is a legitimate reason, wizards are not allowed to connect Muggle fireplaces to the Floo network..."

Mundungus waved his hand.

"Rules are dead. You know what I mean." He winked at Hermione, with a tacit and funny look, "Do you dare to say that Sirius' ancestors have never privately set up the Floo Network? And the Ministry of Magic - hehe, it's just a nice thing to say..."

He began to search his pockets everywhere, and finally took out a dirty black pipe and put it in his mouth, then looked up at Harry and Hermione.

"Do you mind?"

"What? Oh, uh, of course not -"

"Thank you." He lit the pipe with his wand and took a deep breath. After a few seconds, he exhaled a large puff of green, stinking smoke, "You have to take a few puffs every hour to stay awake -" Mundungus said in the smoke, as if explaining to them.

Harry and Hermione shrank to the other end of the sofa quietly, away from him.

"Do you want to eat something, Hermione?" Harry asked loudly.

"Since you say so..." Hermione glanced at the smoke that was expanding outward and stood up decisively: "I am indeed hungry."

They walked towards the kitchen.

"Bring one for me, too, thanks--" Mundungus called from the living room.

"Can you cook?" Hermione asked in a low voice in the kitchen.

"A little bit. I've practiced at the Dursleys'. How about you?"

"I can cook a little bit, too." Hermione said guiltily.

Harry's hand touched the refrigerator door, "Oh no." He said.

"What--"

The refrigerator door was opened, and except for two tomatoes on the top shelf, there was nothing inside. Harry reached out and fiddled with it, revealing a large mold spot on the tomatoes.

"I forgot that Sirius hasn't been eating at home much recently." Harry said.

Hermione blinked, "Can you accept compressed biscuits?"

"I'm not so hungry all of a sudden," Harry said hurriedly, "I just finished my meal."

"Me too." Hermione said with narrowed eyes.

In the end, only Mundungus got to eat the compressed biscuits. Harry and Hermione had no appetite because the house was full of the smell of burning smelly socks. Harry had to open the window for ventilation.

At this time, he saw a familiar figure walking across the street.

"Professor?" he said with joy.

Felix looked at Harry in front of the window, nodded with a smile, and then was stimulated by the smell in the house.

"Sweeped away by the whirlwind."

The smoke and dust in the house were swept away by a whirlwind. Harry and Hermione were obviously relieved, and Hermione breathed in freely.

"I arrived half an hour early and found that you had already left," Felix said to Harry and Hermione, "Then I was tripped up by something and spent some time convincing your family."

"You met the Dursleys?" Harry shouted.

Not only that, Felix thought. He glanced at Hermione. Her parents were also very persistent. It seemed that they knew he was coming and waited on the roadside to block him in advance.

"I saw it," Felix said briefly, "your cousin had some problems. When he saw me, he kept squeaking. Your uncle almost rushed up to hit me..."

Harry looked at him in confusion.

"... Later I found out that it was your cousin who stole the ice mice from Honeydukes. I had nothing to do with it."

Felix looked at the clock on the wall, "It's almost time." He took out a note from his pocket and handed it to Harry, "You two read it once, remember this address, you won't need it in the future."

Harry and Hermione took it. The note said "No. 12 Grimmauld Place". The two memorized it several times, and then the note turned into ash.

"Professor, are you the secret keeper of Black House?"

"I'm not," Felix didn't elaborate, "Dumbledore is, and he also provided the note."

At seven o'clock, the green flame rose in the fireplace.

"According to the agreement, we have about two minutes, hurry up." Felix pushed Harry to the fireplace and urged, "If you have any questions, talk about it over there."

He put all the luggage in the ring.

Harry, holding Hedwig, stood in the flames and shouted "Number 12, Grimmauld Place". His figure spun and disappeared, followed by Hermione, Mundungus, and Felix, who were holding Crookshanks, and finally stood in the fireplace.

"Master Harry." A low and hoarse voice said.

Harry was startled. His glasses were blocked by thick dust, and he vaguely saw a thin figure.

"Kreacher?" he asked tentatively.

"It's Kreacher!" The old house-elf said happily, taking out a feather duster from behind and jumping to help Harry clean the dust on his body.

"Oh, thank you - thank you, no, I can do it myself -"

Harry said, he saw a small square object dangling in front of his eyes, he took off his glasses and wiped it on his clothes.

At this time, Hermione, Mundungus and Felix also came over.

After wiping his glasses, Harry stared at the green thing just now - it was a locket hanging on Kreacher's chest.

"Sirius gave this to you?" Harry asked in surprise. This thing was Regulus's relic, a fake Horcrux. He thought Sirius would keep it and not show it to anyone.

"The master is very generous. He allowed me to keep it." Kreacher said.

At this time, a person rushed out from the living room.

"Remus," Felix greeted, "I didn't expect to meet you again so soon. Have you completed your mission?"

"Yes." Lupin said in a strange manner.

"I'm going to change my clothes and then stay in the study for a while. You can answer their questions." Felix said. Lupin

nodded: "Leave it to me."

"I'm going to sleep for a while. Call me when it's time for dinner." Mundungus said, yawning and walking towards the sofa in the living room.

"Did the professor join the Order of the Phoenix too?" Harry stared at Felix's back as he disappeared into the stairs and asked with great interest.

"He didn't." Lupin said, "But he is on our side. He is our ally-"