"It was clearly written on the statistical sheet that Teacher Bai brought that my class had 17 students and teachers in total. But when I counted myself, I found that there were 17 students in the class! In other words, there was one extra student in the class! The actual number of students should be 16! I don't know if Teacher Bai overlooked this because he was careless or for some other reason!"

There were photos attached to the student files. By comparing his memory, Chen Ge quickly found five files from the file bag. Chen Ge had never seen any of these five people in the class.

"Five people are missing from my class?" Chen Ge quickly thought of something else. There were exactly five human-shaped shadows on the wall of dormitory 413 where he lived!

"Is it a coincidence? Or did the five missing people all become shadows on the wall?" Chen Ge flipped through the student files again and found another problem: "Why can't I find Xiao Lin's file?"

After looking through it twice, Chen Ge did not see Lin Sisi.

"Could it be that the extra person in the classroom at that time was Lin Sisi? Or me?"

Chen Ge recalled the contents about Xiao Lin in the Nightmare Academy diary. Xiao Lin liked to play pranks, and later the whole class played a joke on him.

"I seem to understand a little bit." Chen Ge did not say the second half of the sentence. He felt that Lin Sisi might not represent a person, but an identity.

No one here is his friend, but at the same time, everyone has some unknown relationship with him.

"There is no help, no clues, and everyone I see is an enemy. In this situation where I could die at any time, I have to face almost hopeless 'rules' of the academy. Is this the four-star difficulty?" Chen Ge unconsciously exerted force on the file. He subconsciously glanced at his own shadow, and there was nothing unusual there.

The truth is often the cruelest and the heaviest. Chen Ge took a deep breath and said, "It doesn't matter. At least they are not a monolithic group. I still have a chance."

Everyone in the school has their own ideas, and they all want to achieve their own goals. This is an opportunity for Chen Ge!

After memorizing the faces of the five people in the files, Chen Ge stuffed the entire file into his backpack.

He continued to search the bedroom, while Wang Xiaoming lay on the door panel, eavesdropping on the sounds outside with a nervous look on his face.

"Xiao Ling, please open the door. Uncle is worried about you and afraid that some bad guys will run into your house."

"The little pet my dad gave me escaped from its cage and I was trying to catch it in the house."

"The little pet your dad gave you?"

"Yes, Uncle Zhang, please don't tell anyone else. I promise it won't affect anyone."

"Old White is kidding. The school rules do not allow pets. Forget it this time. Just get rid of that thing as soon as possible."

"Okay, Uncle Zhang, please don't tell anyone."

"Don't worry, there's no way I could tell anyone else about this."

The sound in the living room disappeared. After a while, Bai Ling ran over and opened the bedroom door: "He's gone."

"Could he still be hiding at the door?" Chen Ge leaned his left hand holding the bag behind him. He was worried that the girl would notice the bulging backpack.

In this short time, Chen Ge searched the bedroom and found a teacher's ID, a meal card, and a library card in addition to the student files. He didn't care whether those things were useful or not, and stuffed them all into his bag.

"They must have really left. Teacher Zhang is a very nice person, but he can be suspicious sometimes." Bai Ling brought Chen Ge and Wang Xiaoming to the door of the living room. She asked Chen Ge to look through the peephole first, and only opened the door after making sure that there was no one outside. "Let's go. I'll wait for you outside the repair room."

There were no lights in the corridor, it was pitch black, and it felt like something would rush out at any moment.

Chen Ge made a gesture for silence. He first turned off all the lights in Bai Ling's room, and only walked out of the room after his eyes got used to the darkness.

"Be careful." Chen Ge is a person who knows how to use his advantages very well. He has Yin pupils, and his keen senses and extraordinary vision can play the greatest role in the dark.

The three of them came to the end of the corridor together. Bai Ling took out the bunch of keys from her pajamas pocket and tried them one by one.

Any noise in the quiet corridor would be amplified. Wang Xiaoming pressed his body against the wall and looked around nervously, while Chen Ge stared at Bai Ling to prevent her from making any small moves.

On the fourth attempt, the retaining spring in the door lock popped open and the door to the repair room opened.

"Is it the yellow copper key?" Chen Ge's pupils shrank. He looked at the key and felt that it looked very familiar.

Reaching into his backpack, Chen Ge found the long bunch of keys that he had found in Xiaolin's backpack.

When he first got the bunch of keys, Chen Ge was wondering why Xiao Lin had so many keys.

"This key seems to be on Xiaolin's keychain!" Chen Ge didn't know where Xiaolin got the key from, but this discovery was good news for him. If he encountered a door that couldn't be opened in the future, he could use the keys in Xiaolin's backpack to try one by one, and maybe he could open it.

"Assuming that Xiao Lin is an identity, the existence of this key can indirectly prove that Xiao Lin has been to the repair room?"

"Don't be in a daze! Find something quickly, someone will probably be here soon." Wang Xiaoming secretly pointed at Bai Ling, as if to say that Teacher Bai might be going home soon.

Chen Ge didn't waste any more time and entered the repair room, but the scene he saw was something he could never have imagined before entering.

This room is indeed filled with tools, but they are not tools for repairing machinery. Instead, they are tools related to the human body, such as gum separators, periosteal elevators, wire cutters, ophthalmic scissors, needle holders, hemostatic forceps, curved pliers, etc. that only dentists use.

"Have I come to the wrong place?" In the center of the room was a table covered with white cloth and with a bulge. In the four corners of the room stood four mirrors covered with white cloth. The surrounding shelves were cleaned and filled with all kinds of strange tools, many of which Chen Ge did not recognize.

"Is this the repair room?"

"Yes." Wang Xiaoming and Bai Ling said in unison. Their faces became even paler after entering the room.

"I'm afraid this repair room is not used to repair furniture and electrical appliances." Chen Ge said nothing more. He moved quickly in front of the shelves. Some things cannot be changed, so he should do his best to change what can be changed. "It's okay. The tools used to extract teeth should also be used to extract nails."

The repair room was not very big, and there was no blood or stains to be seen. It seemed that someone cleaned it every day.

After stuffing all the tools he could use into his bag, Chen Ge quickly walked to the first mirror.