Eric slowly slid his entire body into the room from the window of the caretaker's room, then stretched out his long legs and lightly tapped his toes on the ground without making a sound.

Dive into success.

Climbing the library's façade was not a difficult task for Eric, he could easily do it with his bare hands. And this is all thanks to the teachings of the teachers.

Geralt.

To this day, the sight of the teacher standing on the ground teaching him to climb the cliff with his bare hands is still vivid.

But Eric hadn't learned Geralt the trick of opening the window from the outside without making any noise.

This is the Thief's specialty.

In fact, Eric had quietly opened the locked windows when he had left the library earlier.

Mara, the administrator, rests in the cubicle of the administrator's room. Eric believed that as long as he didn't make too much noise, he would sleep soundly. After all, Marat was overworked today from carrying a large number of books.

Without the light of the street lamp, Eric's pupils suddenly dilated in the dark room. He opened the door and walked through the rows of bookshelves on the second floor, and immediately felt a peaceful atmosphere that was completely different from the daytime.

Sure enough, the library needs to be quieter.

However, after turning around, Eric did not find a staircase leading to the third floor throughout the second floor.

There are no dark rooms, and there are no secret doors that exist in the ceiling.

Nothing.

There is no indication that there is another floor above.

But the height of those differences... Eric knew there couldn't be nothing.

The third floor of space.

He had observed from the outside that there were no windows on the exterior wall of the third floor.

It was completely hidden.

Eric closed his eyes and thought about something, and when he opened them again, an Alpha Eye appeared.

Outside of the naked eye, it's the best investigative tool.

Then, Eric looked up.

Sure enough, the entire ceiling was shrouded in a faint magical enchantment.

Originally, Eric was still thinking about checking from the roof to see if there was a secret door to enter. It now seems that that will only be in vain. Magical enchantments are beyond the reach of very human beings.

Unfortunately, in the realm of magic, Eric, the exorcist hunter, can only be considered an ordinary person.

A mage sealed the third layer. This can also be seen as a warning to the symbol of sovereignty, enough to discourage the unscrupulous from invading.

This doesn't mean that the average person can't get in.

Eric suddenly remembered the look in Marat's eyes as he changed the subject.

He knew of the existence of the third dimension! and seemed to have been there!

Perhaps, the mage needs a servant to help him clean the house.

Then, the condition for entry can never be the disappearance of the magical barrier. After all, it would be too cumbersome for Marat to have to trouble the mage to unblock the barrier for him every time he entered the third layer.

Mages tend to be efficient, and they hate everything that drags on and out.

In this way, there is still a secret door. It allows the average horse-drawn horse to pass through easily.

It's in the library.

Eric figured this out. Head towards the staircase.

Since the second layer is not there, then it is on the first layer. Anyway, the mage's secret door doesn't have to be spatially adjacent. They often have the effect of teleportation.

The first floor of the library is equally peaceful.

Eric looked around with his magic eye. After looking around, I still didn't find anything. There was not the slightest trace of magical color in the entire layer. He felt a little frustrated, and he couldn't help but wonder if the operation would be in vain.

But at this moment, a slight noise not far away did not escape Eric's ears.

Someone hiding at the end of the bookshelf!

Eric panicked, he didn't think there were other visitors to the library besides him, and he didn't know how long they had been watching him in the dark. It was only at this point that he became aware of the other party's presence. When I calmed down and listened carefully, I heard a slender faint breathing sound.

The stealth technique is good.

Marat? In this case, shouldn't the administrator just show up and stop it?

In this way, the other party, like Eric, is an uninvited guy.

With this figured out, Eric remained calm and slowly retreated without making a sound. Then he touched a door, and with a turn of the handle, he dodged inside.

This is the administrator's room on the first floor.

There is no keeper on the first floor, as only one person needs to stay in the library each night. That man was Marat. As he complained, his colleagues seemed to be familiar with dumping their jobs at him.

Eric couldn't help but sympathize with Marat.

Inside, there is a small door on the left wall, where the wardens change into their work clothes. Great for hiding.

Eric stepped inside, but stopped suddenly. Because he saw someone coming towards him face to face. Moreover, there was not a hint of human breath in that person.

Supernatural creatures?

In such a small space?

In an instant, Eric mobilized his whole body and prepared to meet the enemy. But after a moment, he relaxed again after holding his breath.

It turned out that there was a large floor-to-ceiling mirror directly opposite the door. That's what the cloakroom should be. What Eric had just seen was just a portrait of himself in the mirror.

The detective smiled awkwardly, but fortunately no one saw his embarrassment.

However, such a design is also strange.

Leaving the cloakroom door open, Eric waited for the other party to come to the door.

Probably because of the loss of Eric, the other party's footsteps were no longer so calm, and he obviously began to search.

Finally, the guy arrived at the Administrator's room.

Seeing that there was no one, he walked step by step towards the door of the cloakroom. Then, with one hand, he pushed open the hidden door.

Now is the time.

Eric suddenly jumped out from behind the door when most of the opponent's body was exposed. He pushed the man to the ground and slashed his hands behind his back and rode on top of him.

The other party let out a scream.

The wide-brimmed hat also rolled from the man's head and fell to the ground.

At this point, Eric has completely subdued the opponent.

However, he was not happy at all.

Whether it's the soft touch under his body, or the familiar scream just now. Or the long hair that comes out of the hat.

In the dark, Eric couldn't see the color of the hair.

But he knew it was flaxen.

"Catherine!"

Eric exclaimed.

“.... Sir, I'm so uncomfortable... Please let me go..."

Catherine's voice was apologetic.

......

"Really. I just saw that you didn't take your usual way home, and I followed you curiously. ”

Justification.

"Yes. Then I really underestimate you. It's not easy to follow me completely without me detecting you, and honestly your ability to climb and hide is pretty good. I'm going to be impressed with you from now on. ”

Eric said.

Catherine's skills are surprisingly agile. He couldn't help but suspect that she was doing something else.

Suspicion is in the nature of detectives, and even more so Eric's.

"Hee-hee. These are the skills I learned during my police exam, and they're not bad. I'm a genius!" Catherine said with some embarrassment.

Hey, I'm not complimenting you.

Eric was a little speechless. His sarcastic remarks about Catherine were considered complimentary. It seems that Catherine's mind is as bad as ever.

Importantly, both skills are present in the police officer examination program.

It seems that the idea that Catherine has another purpose can be dispelled.

"Hmm. Talented... Don't stalk me anymore. You can just ask for help. ”

Like all thieves, Eric hates being followed.

"I don't want it. In that case, you'll just say I'm too much of a hindrance, let me go away. ”

Catherine hit the nail on the head.

Eric smiled wryly. After thinking about it, it's really like that.

Well, just forgive her this time.

So, Eric explained to his subordinates that he suspected that there was a secret door in the library.

Catherine, who had gained her superior's forgiveness, rubbed the joint on her body that had been hurt by Eric just now.

"Your hair is all messed up by you. She grumbled and arranged her hair with her hands, and said to Eric, "Don't worry about the secret door yet." Sir, please help me find a hat, I need it to cover my messy head. ”

Don't worry about the secret door... What's going on with that inconsequential tone?

"How far can the hat roll......

Eric sighed for his mentally problematic subordinate. Although reluctant, he also apologized a little for hurting his cute subordinate and began to help find it.

He came to the mirror and scanned the ground.

Suddenly, Eric rubbed his eyes.

Rubbed it again.

Eric stood still.

Strange.

"What are you doing, sir?"

Catherine saw Eric standing there after walking a few steps, her mind full of question marks.

"Catherine. ”

"Huh?"

Eric held out a finger, and Catherine looked in that direction.

I saw a wide-brimmed hat lying quietly in front of the mirror.

"What's the big deal... Target... Huh?"

Catherine also noticed something unusual.

Half a hat lying in front of a mirror, to be exact. Together with the other half of the hat in the mirror, it forms a complete wide-brimmed hat.

That is, half a hat embedded in the mirror?

Secret door.

"Catherine, maybe you're a genius. ”

Catherine looked at her boss's face, and what appeared was the signature smile of her boss when he usually solved a crime.

It's also her favorite smile.