In Conan, people have a brain option system

After Vermouth left and confirmed that Chianti had died, Conan hurried back to Koizumian.

He looked at the empty lobby on the first floor of the hot spring hotel and the empty front desk, and had a very bad feeling in his heart.

Conan came to Koizumi Kunio's room and began to knock on the door desperately.

However, he knocked for a long time, but he didn't get any response.

After Conan realized that the badge communicator he gave to Sera Masumi was taken by Vermouth, he realized that the situation was not good.

In addition, only Vermouth and Chianti had just come out of the hot spring hotel, and Sera Masumi was not seen.

At this moment, he knocked on the door and didn't get any response.

Therefore, Conan's bad premonition in his heart was getting worse and worse.

'Don't be in trouble, Miss Sera.'

Conan thought to himself, ran to the front desk on the first floor, and "luckily" found a room card on the counter.

He placed the room card on the room card encoder at the front desk, and then used the computer that opened the hotel management system to grant the room card the right to open the door of Koizumi Kunio's room.

Then Conan took the room card and ran back to the door of Koizumi Kunio's room, swiped the door and walked in.

As soon as Conan opened the door, he felt a wave of heat suddenly hit him.

Koizumi Kunio's room was much hotter than before Conan left.

Conan could hear the whistling sound of the air conditioner in the living room before he even walked into the room.

At the same time, after Conan saw Sera Masumi, who was lying on the ground and didn't know whether she was alive or dead,

his bad premonition suddenly reached its peak.

"Ms. Sera!"

Conan shouted and hurried to Sera Masumi's side.

At this time, Sera Masumi, who was lying on the ground, looked very pale, and did not wake up after being shaken by Conan.

Conan tested Sera Masumi's breath, and only after confirming that Sera Masumi was still breathing did he breathe a sigh of relief.

As long as she was not dead, there was still a chance.

Conan hurriedly took out his mobile phone, called the emergency number, and called the police.

Then he began to observe Sera Masumi's condition.

But apart from the red and swollen eyes and pale face, Sera Masumi could not see any other characteristics.

'Miss Sera did not suffer from the large-scale blood loss like Vermouth, and even no external injuries were seen. '

'Then she must have been knocked unconscious by Vermouth during the fight? '

Conan thought in his heart, and felt more and more strange.

'Since Miss Sera had fainted and completely lost her ability to fight, why didn't Vermouth take the computer away and make it so embarrassing? '

Of course, Conan did not want Sera Masumi to get into trouble.

However, in that situation just now, the fact that Sera Masumi could survive was itself strange.

Thinking of what Vermouth had said before, "So you didn't know."

Conan quickly realized that there might be someone else besides Sera Masumi who had just fought with Vermouth and Chianti.

'Who was it? '

'It seems that Miss Sera was able to survive, and Vermouth and Chianti were in that state, all thanks to that person.'

'But the only ones who knew about this deal were me, Miss Sera, and Mr. Koizumi.'

'Even Inspector Okamura of the Kanagawa Prefectural Police Headquarters didn't know about this deal.'

Conan felt very puzzled.

At the same time, he began to observe the situation in the room.

There were many traces of fighting in the room, and there were dents on the wall caused by the vase, and cracks caused by the dagger.

There were fragments of the vase scattered on the ground, as well as liquid that should have flowed out of the broken vase, and several plants that were originally planted in the vase.

‘I always feel that the traces of fighting in the room are not as intense as I imagined.’

Conan observed the situation in the room and thought in his heart.

At the same time, what Conan found most difficult to understand was the air conditioner in the room.

‘The temperature and wind speed of the air conditioner were both adjusted to the maximum. Someone must be trying to cover up something.’

Generally speaking, if the temperature at the crime scene is not right, it is usually because the murderer wants to use the temperature to control the speed of corpse transformation and blood oxidation.

But this time, Sera Masumi is not dead, so it is naturally impossible to be the case.

‘And the windows in the room are all open. They were obviously closed before.’

Conan thought about the various doubts found at the scene in his heart, but he could not find any useful clues at the scene.

‘It seems that we can only understand what happened after Miss Sera wakes up. ’

About 6 or 7 minutes later, the sound of ambulances and sirens rang out outside Kosen-an.

Many ambulances rushed over.

Conan led the paramedics and carried Masumi Sera and the unconscious Kosen-an staff into the ambulance.

After examination, Masumi Sera had many bruises on her body.

Especially her abdomen, which had very serious subcutaneous bleeding.

What shocked Conan was that.

In addition to the injuries caused by the fight, Masumi Sera also showed symptoms of hydrogen sulfide poisoning.

"The patient's specific symptoms include shortness of breath, loss of consciousness, imbalance, severe headache, puffy eyes, pale face and drowsiness."

"Judging from the patient's clinical symptoms, this should be a symptom of high-concentration hydrogen sulfide poisoning."

"The patient, Ms. Sera, should have been exposed to hydrogen sulfide at a concentration of about 100ppm."

"Exposure to this concentration of hydrogen sulfide for a few minutes can lead to serious health consequences."

"Thanks to the fact that Ms. Sera was not exposed to hydrogen sulfide for a long time, as long as she inhales high-concentration oxygen and is treated with thiosulfate, she should be able to recover quickly."

Sera Masumi's attending physician explained the situation to Conan.

'Hydrogen sulfide poisoning?! Hydrogen sulfide again?!'

Conan was shocked when he heard this.

He hurriedly told the Kanagawa police about the situation here, and asked the Kanagawa police to test the hydrogen sulfide concentration in Koizumi's room and the surrounding air.

Hydrogen sulfide is heavier than the atmosphere.

So it is easy to accumulate in low-lying areas on the ground.

Masumi Sera fainted in Kunio Koizumi's room, so she should have developed symptoms of poisoning there.

And such a high concentration of hydrogen sulfide should not be easy to spread out.

——Conan thought so, but the final result was very different from his judgment.

The Metropolitan Police Department carefully tested the concentration of hydrogen sulfide in Kunio Koizumi's room and the air around his yard.

The result showed [0.001%], which was not unusual at all.

After Conan learned the news,

he suddenly figured out what was going on with the air conditioner in the room that was turned to the maximum and the windows that were fully opened.