I was in Conan, and after picking up Xiao Ai, I was chased by Hongzi.

"Didn't Conan come here just now? Where has he gone?" Mitsuhiko suddenly realized that Conan had disappeared.

Haibara Ai focused on Otoi Hiroshi, while Otoi Hiroshi focused on the chairs and books that fell to the ground.

She suddenly had some suspicions in her mind, and when she was about to replicate Conan's behavior, she was stopped by Lord Mamiya.

Just when everyone started looking for Conan, Haibara Ai and Otoi Hiroshi deliberately ended up at the end.

"What do you think?" Hui Yuan Ai asked.

"Anyway, whether it's the fire four years ago or the three current heads of the family, I'm confused. If my guess is correct, everything is related to the treasure left by the great master."

"That's it for now. Do you want to go on a wonderful adventure with me?"

After hearing his words, Hui Yuan Ai felt more at ease than ever before and nodded obediently.

After everyone searched for a while, no trace of Conan was found and they planned to search again after dinner.

"It's nice to be so lively sometimes." Mamiya Mitsuru said with emotion.

"By the way, why didn't you see that young man and that little girl?" the eldest lady asked casually.

"Oh. Hong just told me that Xiao Ai is not feeling well. He sent Xiao Ai to the room to rest first." Dr. A Li said.

On the side, Ayumi was worried about Conan and Xiao Ai, so she chose to pack her own bread and prepare to give it to the two of them later.

Seeing this, Mitsuhiko and Genta quickly put their own bread into Ayumi's bag.

In the villa, Otoi Hiroshi took Haihara Ai to a studio and found newspapers from that year.

Reports from that year indicated that the bones of the remains had been burned to ashes, and their relics could only be relied upon to confirm the identity of the deceased.

"Could it be?" Hui Yuan Ai's expression was not very good.

"Well, that is to say, someone who should have died back then may still be alive now, borrowing someone else's identity to act as an undead living in the world." Otoi Hiroshi confirmed her conjecture.

"Isn't Edogawa in danger?" Haibara Ai asked worriedly.

"Just go and see if there is any danger."

Then Hiroshi Otoi took Haihara Ai to the room where Conan disappeared, turned the hands of the clock, and entered.

Using the watch-shaped flashlight on Xiao Ai's hand, the two began to investigate.

When Hiroshi Otoi discovered Conan's blood, Haihara Ai also saw the writing on the wall.

"That person has now replaced my identity and wants to rob the castle's treasure...?" Haibara Ai looked at Otoi Hiroshi.

"It seems that our guess is right." Otoi Hiroshi nodded.

Then, in the darkness, Xiao Ai tripped. Otoi Hiroshi hurriedly took her hand, but this time she did not break away.

Shining the light on the ground, he found a skeleton of white bones.

"The fact that they have turned into white bones shows that they have been there for some time, but judging from the dust on them, they should have been put here not long ago." Haibara Ai analyzed calmly.

As expected of a doctor of biochemistry, Hiroshi Otoi is ashamed.

"Look at the bones of her legs." Otoi Hiroshi reminded him at the right moment.

She shined the light on the skeleton's legs. "Compared with other parts of the bones, the foot bones seem to be thinner."

"Could it be?" A series of clues connected in her mind.

"It's what you think." Otoi Hiroshi said.

Looking at his knowing expression, Haiyuan Ai stared at him, "You shouldn't have guessed it a long time ago."

"Only a little bit ahead of you." Hiroshi Otoi said with a smile.

"Then, you should have cracked the secret code in chess." Haiyuan sighed.

It felt like I was being guided by the other party to discover clues along the way.

Hiroshi Otoi nodded and began to analyze: "Chess is usually marked with the English letters A and H and the numbers 1 to 8, so looking at the entire chessboard from the direction of the knight..."

"Egg head—a crooked intellectual." Before he could finish speaking, Haihara Ai spoke directly.

The answer was ready to come out, and then the two of them walked out of the secret passage, walked to the portrait of the great master, and turned around.

After the portrait, a passage extending upward appears.

For safety reasons, Haihara Ai climbed up first, followed closely by Otoi Hiroshi.

Midway, Haihara Ai suddenly realized something.

"You must not raise your head," she warned.

"what?"

Otoi Hiroshi didn't think of anything at first, but after hearing her voice, he subconsciously looked up.

"I know." He replied calmly.

Today it's a cute little bunny.

Otoi Hiroshi opened the iron door that had not been opened for many years, and a cool breeze blew in his face.

The bright moon, which is not yet full, stands high in the sky. The stars in the sky are like bright pearls, making the dark blue night sky dazzling.

The cold moonlight fell on Otoi Hiroshi and Haibara Ai, making their shadows look particularly slender.

"It's so beautiful, this scenery." Hui Yuan Ai sighed with a smile.

Otoi Hiroshi gently took off his coat and put it on her body, wrapping her little body tightly.

"Be careful of catching a cold," he explained.

Hui Yuarai tightened the loose clothes slightly with both hands, and a smile appeared at the corner of his mouth.

Ever since my sister passed away and I took that medicine and became smaller, I have been living in the shadow of the organization. I haven't relaxed like this for a long time.

That desperate heart seemed to be alive again.

"It seems that this is the treasure left by the great master." Otoi Hiroshi pointed to the words carved on the door.

Hui Yuan Ai raised his head and looked at the string of words.

"I would like to give this castle and this scene to the first person to arrive here."

"This old man is really an intellectual full of crooked ideas." Haiyuan Ai laughed softly.

"Okay, now that the matter is clear, let's go?" Otoi Hiroshi asked.

"Where to go."

"I'm hungry, let's go back and eat first. What?"

"But Edogawa..."

"That kid is Superman, he won't die even if this castle is blown up." Otoi Hiroshi said.

Although he still has the idea of ​​​​looking for Edogawa, Otoi Hiroshi's attitude is obviously that he doesn't want to care about Edogawa. Is it because of the incident in the car that he is holding grudges?

But without Hiro Otoi's help, her tiny body couldn't do anything.

Seeing that he was gradually moving away, Hui Yuan Ai could only keep up with him.

"Haven't you heard yet? My father-in-law once said before he died that as long as he can solve the mystery of this castle, I will give him my most precious treasure." Mamiya Mitsuru told Dr. Agasa. said.

At this time, Otoi Hiroshi also returned with Haibara Ai, and the eldest wife had also left, just missing the two of them.

"It's the chess set in the yard." Hui Yuan Ai said mysteriously, holding his hands behind his back.

Before entering the house, she had already returned the coat to Otoi Hiroshi.

"What do you mean by that? Do you know where the treasure is?!" Mamiya Mitsuru said excitedly.

"maybe?"

After saying that, she turned around and sat next to Otoi Hiroshi, who was already eating.

Seeing the slight change in Mamiya's face, Hiroshi Otoi raised his head and stared at him with cold eyes: "The secrets of the treasure and this castle will naturally be revealed after we find Conan. Before that, I hope you won't be stupid. thing."

After that, he started eating like a normal person.

He and Hui Yuan Ai walked a lot this time, but he was starving.

Mamiya felt the threat in his eyes, his body trembled unconsciously, and the desire for treasure in his heart was calmly suppressed by him.

[Question: What do the three friends of Suihan refer to? 】