The sound continued.

THUMP.

THUMP.

THUMP.

The walls of Moonlight Grand Hotel moved like they were breathing.

Leo Carter stared at the strange underground room.

For the first time in his detective career…

He had no idea what to say.

And that worried everyone.

Especially Oscar Flynn.

Because whenever Leo was silent…

Something terrible usually happened.

Oscar looked at him.

“Leo.”

“What?”

“You are quiet.”

“Yes.”

“That means you are scared.”

Leo shook his head.

“No.”

Oscar narrowed his eyes.

“Then why are you not making a stupid joke?”

Leo looked around.

“Because I am trying to think.”

Oscar became serious.

“That is worse.”

---

Maya Rose walked toward the walls.

She touched the strange hotel symbols carved into the stone.

“This place is ancient.”

Leo looked at her.

“Older than the hotel?”

She nodded.

“Much older.”

Oscar looked confused.

“Wait.”

“The hotel is seventy years old.”

“Yes.”

“But this room looks hundreds of years old.”

“Yes.”

Oscar looked worried.

“So…”

He pointed at the floor.

“The hotel was built on top of something?”

Maya nodded.

“Exactly.”

Leo looked at the message on the wall.

THE HOTEL HAS A HEART.

He whispered:

“The hotel is not haunted.”

Maya looked at him.

“Then what is it?”

Leo answered:

“The hotel itself is alive.”

Suddenly…

The room shook.

A deep voice echoed.

“Finally…”

Everyone froze.

“You understand.”

The walls moved.

The voice continued.

“I have waited so long.”

Oscar slowly raised his hand.

“Can I ask something?”

Everyone looked at him.

“What?”

“If the hotel can talk…”

He looked around.

“Why does it sound like a villain?”

The voice became quiet.

Then answered:

“Because I am angry.”

Oscar nodded.

“Fair.”

---

A section of the wall opened.

Behind it was a long hallway.

But this hallway was impossible.

Doors floated in the air.

Pictures moved.

Old memories appeared like movies.

Maya stared.

“What is this place?”

Leo stepped forward.

“The hotel’s memory.”

Oscar looked confused.

“Buildings have memories now?”

Leo shrugged.

“Apparently.”

“That is terrifying.”

“Yes.”

“Also interesting.”

“Yes.”

“Mostly terrifying.”

“Correct.”

---

They entered the hallway.

The first door opened by itself.

Inside was a room showing a memory.

A young man entered a beautiful hotel.

He smiled.

The sign outside said:

MOONLIGHT GRAND HOTEL

The young man was carrying a suitcase.

Maya whispered:

“That is Vincent Black.”

The same guest from room 666.

They watched.

Young Vincent walked to the reception.

A woman welcomed him.

But then…

The lights changed.

The hotel doors closed.

The walls moved.

The hotel trapped him.

Oscar looked shocked.

“He was not the villain.”

Leo nodded.

“He was a victim.”

---

Another door opened.

This time they saw Bella.

The ghost manager.

She was alive.

Working at the hotel.

Smiling.

Helping guests.

Then the same night appeared.

The night everything changed.

A shadow entered the hotel.

A mysterious manager wearing black.

The original owner.

The shadow touched the walls.

The entire building changed.

Maya whispered:

“Who is that?”

Leo looked serious.

“The one controlling everything.”

---

Suddenly…

A loud noise came from behind them.

BANG!

A door slammed.

Oscar jumped.

“I hate this hotel.”

A small ghost appeared.

It wore a tiny chef uniform.

“Welcome.”

Everyone stared.

The ghost smiled.

“I am Chef Bob.”

Leo blinked.

“You are a ghost chef?”

The ghost nodded proudly.

“Yes.”

“What do you cook?”

Chef Bob smiled.

“Fear.”

Silence.

Then Oscar whispered:

“That is the worst menu item ever.”

Chef Bob laughed.

“Don’t worry.”

“I also make ghost cookies.”

Oscar looked interested.

“Ghost cookies?”

Leo looked at him.

“Seriously?”

“What?”

“We are trapped in a haunted hotel.”

“And?”

“You are interested in snacks?”

Oscar shrugged.

“Fear makes me hungry.”

---

Chef Bob led them deeper.

“You need to find the hotel’s heart.”

Maya asked:

“Where is it?”

The ghost chef pointed.

“Below the oldest room.”

Leo frowned.

“The oldest room?”

Chef Bob nodded.

“Room Zero.”

Oscar looked worried.

“Why does every haunted place have a room with a scary number?”

Leo sighed.

“Because normal rooms are apparently boring.”

---

They reached a giant door.

Above it was written:

ROOM ZERO

Leo opened it.

Inside was a massive chamber.

In the center was something impossible.

A glowing heart.

Made of stone.

Connected to the entire hotel.

Pipes and roots spread everywhere.

The hotel’s heartbeat came from it.

THUMP.

THUMP.

THUMP.

Maya whispered:

“This is the heart.”

Suddenly…

The heart spoke.

“Yes.”

Everyone froze.

“You found me.”

Leo looked around.

“Who are you?”

The heart answered:

“I am Moonlight.”

“The soul of this hotel.”

Oscar looked confused.

“The hotel has a name?”

“Yes.”

“That is strange.”

“I know.”

---

Moonlight continued.

“I was created to protect people.”

“Then why are guests trapped?”

Maya asked.

The heart became quiet.

“Because of him.”

A shadow appeared.

The original hotel owner.

The dark manager.

He stepped out.

Everyone recognized him.

The creature from room 666.

He smiled.

“Hello again.”

Leo looked angry.

“You are controlling the hotel.”

The man nodded.

“Yes.”

“Why?”

“Because this hotel belongs to me.”

Moonlight’s voice became sad.

“No.”

The shadow smiled.

“You were created by me.”

“But you forgot one thing.”

“What?”

“I gave you life.”

The hotel shook.

“And now I will take it back.”

---

The shadow raised his hand.

The heart began losing energy.

Maya shouted:

“Stop!”

The shadow laughed.

“You humans always try to save things you don’t understand.”

Leo stepped forward.

“Actually…”

Everyone looked at him.

“What?”

Leo smiled.

“We understand more than you think.”

The shadow laughed.

“And how?”

Leo pointed around.

“Because this hotel does not want to be controlled.”

The walls moved.

The doors opened.

The ghosts appeared.

Bella.

Chef Bob.

The bellboy.

Even Vincent Black.

They all stood together.

The shadow looked surprised.

“You cannot fight me.”

Bella smiled.

“Maybe not alone.”

Sirens started outside.

The hotel shook.

Suddenly…

A voice echoed from the entrance.

“I think my friends need help.”

Everyone turned.

Sir Giggles appeared.

The ghost from their previous adventure.

Max was not there.

But Sir Giggles had arrived.

Oscar’s eyes widened.

“Why are all ghosts showing up now?”

Leo smiled.

“Because apparently ghosts have better teamwork than humans.”

---

The shadow became angry.

“You think this changes anything?”

He looked at Leo.

“The hotel will fall.”

The heart began cracking.

Everyone panicked.

Moonlight whispered:

“Only one person can save me.”

Everyone looked around.

“Who?”

The heart answered:

“The person who has no fear.”

Everyone looked at Leo.

Leo pointed at himself.

“Me?”

Maya nodded.

“You are the detective.”

Oscar smiled.

“You are brave.”

Leo looked uncomfortable.

“Actually…”

Everyone waited.

Leo sighed.

“I am terrified.”

Silence.

The heart glowed.

Then…

The hotel began healing.

Everyone stared.

Maya smiled.

“You were honest.”

Leo nodded.

“The heart wanted courage.”

“Not fearlessness.”

Sir Giggles smiled.

“Exactly.”

---

The shadow screamed.

“No!”

He attacked.

The entire hotel shook.

The final battle had begun.

Ghosts fought.

The hotel moved.

Doors opened and closed.

Rooms changed.

Everything became chaos.

Oscar accidentally pressed a button.

A room appeared.

“What did I do?”

A ghost looked out.

“You opened the karaoke room.”

Everyone froze.

Then…

Hundreds of ghosts started singing.

The shadow covered his ears.

“What is this?”

Leo smiled.

“A weapon.”

“The karaoke room?”

“Yes.”

“Why?”

“Because nobody can survive ghost singing.”

Even the villain looked terrified.

---

The shadow escaped into darkness.

Before leaving, he whispered:

“You may have saved the hotel today…”

“But tomorrow…”

“I will return.”

The hotel became quiet.

The heart stopped cracking.

Moonlight spoke:

“Thank you.”

Leo smiled.

“Are we free now?”

The hotel answered:

“Almost.”

Everyone became nervous.

“Almost?”

A door appeared.

A new door.

With a number.

ROOM 999

Oscar screamed.

“No!”

Leo looked at it.

A new mystery.

A new danger.

A new secret.

And from inside the room…

A voice whispered:

“Your next check-in begins soon.”