In addition to Tang Jiumin and Li Shengrui who could not see any reaction, Mr. Wei and Song Yue all had their eyes lit up.

Song Yue was a little surprised, and she said, "The house of the castle owner?"

Wei Yihai nodded, "There are only four rooms. I think I will find them when I open one by one."

The owner of the castle is really like what Wei Yihai said, right in these four rooms that have already walked to the end?

Tang Jiumin looked around.

Judging from the dungeon, he was not very convinced that he could find the house of the castle owner so easily.

"Wait a moment."

"What's wrong? You don't think you're not even here, right?" Wei Yihai spread his hands and reminded the other party helplessly, "If this happens, there will be no room for the castle owner on the entire third floor."

"Maybe we should go to the fourth floor? But this ghost castle does not have a fourth floor."

Wei Yihai told a cold joke.

Tang Jiumin looked at a room close to him, raised his hand and put it on the door handle.

Press gently, and the door handle slightly loosens downwards.

"Or why you open it and take a look. Anyway, I think it's the probability of choosing one of four." Wei Yihai couldn't help but urge him when he saw Tang Jiumin's actions.

"We have been looking for a lot of time. The last hope is here. It's impossible not to open it and take a look. And I think the possibility here is the greatest..."

Tang Jiumin ignored Wei Yihai's nagging urging. He withdrew his hand, walked along the corridor to the end, and took out the causal lamp in his backpack.

In an instant, the causal light burst out with light that was far beyond the normal brightness.

After taking back the causal lamp, Tang Jiumin confirmed his conjecture.

After coming to the third floor to start searching, Tang Jiumin had taken out the causal light six times, but this was the first time that the causal light burst out with this brightness.

Tang Jiumin looked up at the ceiling.

There is nothing wrong with it.

But if those four rooms are really the rooms of the castle owner, why can the door be opened from the outside as the ones outside?

It's so easy to open it?

From the beginning to now, Tang Jiumin has noticed a problem, that is, these rooms can be easily opened by outsiders.

Something is not right.

Is this how the copy is set? Tang Jiumin had a moment of suspicion in his mind, but he decided to look for it again. So, Tang Jiumin walked to the end of the corridor.

This is a wall with a blue luster, which is in line with the color of the tiles posted on the floor, giving people a feeling of being integrated.

Moreover, some patterns of blue sky and white clouds are specially carved on the walls, giving people the experience of being in the blue sky.

Tang Jiumin touched the blue sky and white clouds on the wall with his hand, and then found that the blue sky was flat, while the white cloud patterns on it were carved and protruded outward.

Tang Jiumin observed carefully again and found a different place.

Wei Yihai watched Tang Jiumin leave, and was stunned at first, then looked in the direction where Tang Jiumin left.

…At the end of the corridor?

"What do you mean?"

The three of them only saw him fumble on the wall for a while, but it turned out that it seemed like a wall and moved.

Wei Wudao looked ahead, his pupils shrank slightly, and then he looked at Tang Jiumin and sighed: "I didn't expect there was a mechanism, but the young man was still powerful, and he was old."

A mechanism is opened.

When the wall shrinks in all directions, everyone sees what it looks like inside.

A circular space.

"This is……"

"study!"

"If this is a study room, then these four rooms..." Wei Yihai looked back at the four rooms behind him with a bad look.

"What do you think will happen after these four rooms are opened? Let's open it and see." Tang Jiumin asked back.

Wei Yihai stopped talking.

The four rooms are likely to be unknown traps.

Wei Yihai's face was a little uneasy. He showed a reluctant smile and quickly changed the subject, "Since we have found the hidden study room of the castle owner, let's hurry up and find clues."

Tang Jiumin did not point out the other party about Wei Yihai's embarrassing change of topics, and he took the lead in walking into the study.

From the entrance, it looks like a closed cylindrical space opening up a gap. Looking around, there are bookshelfs that stick to the walls, and there are many books on them.

Mr. Wei was the last one to enter the study room.

When he saw so many books placed there, he couldn't help but sigh: "The owner of the castle must be a knowledgeable person."

Song Yue muttered: "This is not necessarily the case. You can read any book as thick as a brick. Even if the owner of the castle has been reading these books since he was a child, can he finish reading them thoroughly?"

As she said, she pulled out the thickest book on the bookshelf in front of her. As soon as she pulled it out, a small book fell out of it.

"This is……"

"Look at what I found!"

"What? Let me take a look!"

When Wei Yihai heard Song Yue's shouting, he was the first to rush to Song Yue and snatched the notebook.

"What did you find?" Tang Jiumin walked over and asked.

Mr. Wei took the initiative to answer: "It was a reply from the detective center, but this letter was disguised for a while and became a folded notebook."

"It says: Dear Marquis xxxx, according to your commission, my detective agency has sent the most professional personnel to investigate. Before we can sneak into your castle in disguise and follow the matters of discussion, we will get an important clue first."

"The person who framed you is indeed in the castle, and the other party is still in contact with your enemies and keeps eye on your every move. My detective agency has obtained some clues about the spy. This person is code-named loyal and only delivers messages to the outside at night. Please be sure to pay attention to the sneaky people at night."

"But please rest assured, believe in the ability of my detective agency. According to the agreed entrustment period, we will definitely find out the spy lurking in the castle."

The amount of information is relatively large.

"Does this mean that the code name is loyal and the one who has enough time to leave the castle at night is the evil ghost we are going to kill in this mission?" Wei Yihai said with a flash of eyes.

"Loyalty? This code name sounds ironic and strange. Will the identity of the castle spy be related to these two words?" Song Yue expressed his opinion.

Based on the current clues, it seems that there is no problem with the two people's ideas.

Just as the four of them surrounded the notebook, Li Shengrui picked up an unopened letter on the other side and shook it at the few people.

"This book may be a little problem."

The voice is still the same, very low, making people unable to tell the difference between joy and anger.

He held it in his hand a letter that had not yet been opened. After seeing it, several people put the letter on the desk and opened the ink.

This is a reply letter, replying to the letter sent by the castle owner before.
Chapter completed!