At half past three in the afternoon, the computer company, the fifth floor.

There were several people standing outside the security door on the fifth floor, their faces panicked and anxious.

"Manager, you're here. The door won't open, and I heard someone screaming as I passed by just now. Helen explains.

There is a transparent glass next to the security door, and an iron bar is installed on the outside, which seems to indicate that this is a secret room.

"What? Don't? Maori Kogoro's eyes suddenly turned pale, "Smash this away!" ”

"Mr. Maori, you mean smashing glass? But this glass is made in China, and it can't be smashed open. The manager said helplessly.

"What? Mr. Maori? Helen was surprised.

"Are you the famous detective, Mori Kogoro?" Another clerk adoringly said that his name was Larry.

"That's right, in Shimomori Kogoro yes." The Maori detective was slightly apprehensive, and Conan glanced at him with hatred.

The manager brought an iron axe, and Mori Kogoro cut the iron fence with ease, and then slashed at the glass with all his might.

In an instant, there was a loud bang, as if something was cracking—but instead of the glass shattering, it was the iron axe that had been knocked down, but the glass was intact.

Everyone is drunk: Chinese glass is too scary!

"Then I'll have to break this door, sorry." Mori Kogoro picked up the axe, "But this axe is broken, what should I do?" ”

At this time, Xiaolan stopped Maori Kogoro and told them to step back, run towards the security door from a distance, and kicked the door over, and everyone was shocked.

"Great, amazing......" The staff Helen, Larry, and the manager Barry were amazed, and even Shirazume felt terrified, and couldn't help but think of his own shadow - Kyogoku Ma. And Conan and the Maori detectives have long been used to it, and they are not surprised.

"Let's go inside."

There was silence inside, however, everyone's eyes widened, and Xiaolan even exclaimed - a person died in front of the computer!

The floor was stained with blood, and some of the blood was spilled on the computers around it! A three-year-old child can know that he killed him, think about the blood splashed at that time!

"He's dead." The Maori detective discovers that the man has no pulse.

"Hurry up and call the police, no one is allowed to destroy the scene, including you two little ghosts!" The Maori detective commanded.

"I'll go call the police!" Xiaolan ran out of the door.

"Why, how can this be, he's Bob!"

Conan frowned, almost all the doors and windows on the scene were locked inside, leaving only one window open, and looking out of the window, the walls of the building basically did not give people the possibility of climbing the wall, unless he was Kidd. There's a parking lot underneath, but under the windows are a couple of large trash cans.

"It looks like it's a closed room, but it's not sure it's a secret room." Conan made a preliminary judgment in his mind.

"Where's the security key?" Conan asked.

"It was still in my bag when I got off work, but now I can't find it, I guess it was stolen." Barry, the manager, replied.

"It's you little ghost again, don't get in the way!" The Maori detective punched Conan in the head, raising a small hill and pushing Conan outside, "Really! ”

"Helen, you passed by the building earlier and heard screams inside, are you sure it's true?" The Maori detective asked.

"I'm sure Bob should have been killed by that time, and he could have testified to passers-by on the street at the time." Helen explained.

"Well, then the murderer should have the key, lock the door and escape after killing someone."

"No, Mr. Maori, look, my key is on the computer desk, and I have and only one key!" Barry, the manager, yelled at the computer desk.

"What? It's the Chamber of Secrets! Mori Kogoro was taken aback.

Conan has long seen it, but, how did the murderer arrange the secret room?

"Surveillance was also broken in advance......"

There must be a mistake in 100 secrets, and there is no case without clues!

Conan observes the computer desk, where there are several large books on the desk and on the floor, as if there had been a fight on the spot.

"But what is Bob doing here?" Barry asked.

"It must be stealing company secrets and selling them to other companies!" Both Helen and Larry affirmed.

"Hey, Kudo, you're going to start solving the case again?" Belltron took Conan to the bedside and asked sarcastically.

"Of course, it's just that we haven't finished looking for clues yet." Conan replied, "I know you're not interested in the case. ”

"You say, will the snow stop?"

"The snow will stop sooner or later, but the blood, the blood, will not stop - the blood of the blood."

"Alas, the world is up and down, you go on, I won't bother."

Conan also checked the window, and there were no signs of ropes on the window.

"Hey, this computer seems to be turned on, oh, there's a text message on the display!" Helen reported that there were chats between Bob and other companies on the computer at this time, and there was a message on the chat bar that had not been sent, but it was a strange message - PQFFU.

"This news was typed by pressing the keyboard randomly." Barry said.

"No, this may be a clue to the murderer left by the deceased Bob, that is, the message before death, you see, Bob was not mortally wounded, but died of excessive blood loss." The Maori detective speculated.

"But what does this news mean?" Helen asked.

"PQFFU, it's neither an English word nor an acronym, it looks like it's pressed randomly, which is annoying." The Maori detective pondered, and Conan took out a sketchbook.

Suddenly, Officer Twilight and several police officers entered.

"Brother Maori, we meet again, do you have a clue about this murder?"

"Not yet, it's getting a little complicated, but Officer Twilight, I promise, I'm going to crack this case!" The Maori detective confidently said, "So, you're the murderer, Helen!" ”

"Huh? What, You are kidding! Helen panicked, "How could it be me?" ”

"Did you preset that sound in advance with the radio here? Bob steals the manager's key and steals company secrets after work, and when you see him, you kill him and take the key. When you came in just now, you put the key back unnoticed, you see, this key is placed in an abnormal position, why is it placed behind this pile of books? The Maori detective said confidently.

"But you don't have proof, and others can!"

"Oh, yes, I'm sorry......" The Maori detective was embarrassed.

"The key is at the back of the book? Behind the key is this open window...... Oh, you can do that! Conan checked the window again, ran upstairs again, the sixth floor, opened the window, and found no trace of the rope!

"Am I guessing wrong, how can this be?" Conan had no evidence to prove that the secret room technique he thought was valid, and looked down casually, "Huh, steel pipe?" ”

Conan picks up the pipe and finds that it is empty inside, meaning that the rope can pass through it. Conan rubbed the upper end of the window with a steel pipe again, and found that there would be no traces!

"So that's the case, so to speak, there's definitely that kind of thing in the trash cans under the building!" Thinking about it, a garbage truck drove down and stopped.

"Garbage truck! Oh no, I need to hurry! Conan sped downstairs through the snow.

Luckily, there was a longer hollow steel pipe in the trash can.

"Very good, the secret room technique has been cracked, just who is the murderer, what does PQFFU mean?" Conan panted and slowly walked upstairs with a steel pipe.

Mori Kogoro had already dug up PQFFU at this time, but he didn't know what it meant.

Look at the deceased Bob, who had stab wounds to both his left and right hands.

"Wait! There are knife wounds on both sides of the hand! In this way, when he entered this death message, his hands were already difficult to control! And I don't dare to turn on the lights here, the light is dim. In that case, there's a good chance he's pressed the wrong key! "What did the Maori detective think of.

"Uncle?" Conan was taken aback, Uncle Maori played well today.

The Maori detective analyzed: "So, if the deceased would have pressed the wrong key, it should be considered like this - the letters around the P key on the computer keyboard, including itself, have P, O, L. The Q key corresponds to Q, W, A. The F keys correspond to F, R, T, G, V, C, D. U key corresponds: Y, H, J, I. IF YOU ARRANGE IT, THERE'S LARRY! That's you, Larry the Murderer! ”

"Ah, I didn't kill anyone!" Larry was shocked.

"The murderer must be someone inside, and these letters are only you." The Maori detective speculated.

"But Helen called me before and told me to come here quickly, I was still at home at the time, you don't believe I have proof!"

Yes, the murderer must not be Larry, is my uncle's analysis wrong? Still is......

！！！

A bolt of lightning struck, Conan hurriedly rushed over and opened the computer keyboard used by the deceased: "Sure enough, the murderer is him!" There is only one ...... truth"

On the keyboard, on the N, Q, F, F, U keys, there are blood stains.

Outside the window, the snow is still drifting; Inside the window, the blood was still flowing......