In front of the rubble pile-up ruins, Conan, Kaito, and Lupin reached an agreement, then took a flashlight to shine around, and finally walked together in front of a cave:

“...... There doesn't seem to be any hidden passage in the walls around here, and it seems that this cave is the only way out. ”

"Then let's go and see what is in this dungeon!"

The three of them looked at each other, and then walked into the cave together.

The cave was pitch black, and the three of them walked cautiously, and it didn't take long for them to pass through the cave, which was only twenty meters long, and stood in front of a corridor about fifteen meters long and three meters wide and high.

The walls, ceilings, and floors on both sides of the hallway are all masonry structures, and they do not appear to be out of the ordinary.

Conan, Kaito, and Lupin stopped in front of the hallway, and then shone their flashlights around, and it didn't take long for all three of them to have smiles on their faces:

“...... At first glance, it looks like an ordinary hallway, but there are some dark holes in the walls on both sides, and something should pop out of them, and as for the 'button' that triggers the mechanism, it should be on the ground......"

"That's right. Conan nodded, then shone his flashlight on the ground and said with a smile, "...... If you look closely at the shape of the bricks on the ground, you can see that most of the bricks here are rectangular structures of 40 cm × 20 cm, and only a few are 30 cm × 30 cm square structures......"

“...... Moreover, the bricks of these square structures are just enough to move from each other, that is, ......"

"As long as we step on these squares, we can pass by the way!~" Lupin III grinned:

“...... The mechanism in this castle is surprisingly simple!"

Kuaito also nodded in agreement, and said with a smile: "It's normal for the mechanism to be simple, right? After all, this is the underground palace of his own castle, in my opinion, Mr. Xiyi built this underground palace, it should be a place for the little pot friend to explore and play! So, the things that will emerge from the dark holes in the walls on both sides are nine times out of ten that they are some blunt wood and the like, and they will definitely not hurt people......

"That's right, who would build a mechanism in their castle that would really kill people!~"

Conan, Kaito, and Lupin spoke, and then Conan took the lead, and the first one walked on the square floor tiles, turned his head to look around, and said with a smile:

“...... Safe!"

......

Kiichi's office underneath.

Under the leadership of Shu Yunwen, everyone walked down the stairs together, stood in front of a corridor, stopped, and looked back and forth-

Before entering the dungeon, Cheng Shi had already investigated all the mechanisms in the dungeon.

According to Chengshi, there are two entrances to this underground palace, and no matter which entrance you enter, you will eventually meet on the same road, and the end of this road is the palace where the mask is hidden.

Before the meeting, the length of the two paths and the order of all the organs, including them, were the same......

Shu Yunwen was thinking about it, Uncle Maori was holding a flashlight in his hand and looked around curiously: "...... Really, Yunwen-san, didn't you say that there are many mechanisms in the dungeon? We walked from the office to the bottom of the dungeon, and we didn't meet a single one......"

Shu Yunwen turned his head to look at Uncle Maori, and then pouted:

“...... It was a staircase, and there was only one mechanism that closed and opened the entrance! But here, the mechanism officially began. There is only one road ahead of us, but there are many detours and mechanisms. Like the hallway in front of us, there's a mechanism in it......"

"Is there a mechanism in the corridor ahead?" Xiao Lan looked worried, "...... It can't be dangerous, right?"

"Uh...... This ......" Shu Yunwenzheng didn't know what to say, and Nanatsuki had already spoken: "...... Also, the method of cracking the mechanism seems to be related to the shape of the bricks on the ground, as long as we follow those square bricks, we should be able to pass by the way......"

When Yueshui Qizuki's words fell, Shu Yunwen was slightly stunned, and then spoke: "...... The type of trap you said is correct, but the method of cracking is wrong! The square brick in the middle of this corridor will trigger the trap, and if you step on all the square bricks, the trap will activate......"

“...... If you want to pass safely, you have to avoid the square brick in the middle and step on the rectangular brick next to it......"

As soon as Shu Yunwen finished speaking, the corners of Yue Shui Nanatsuki's mouth couldn't help twitching twice:

“...... What? The square brick in the middle will trigger the trap when stepped on? What did Mr. Kiichi deliberately put a series of square bricks in the hallway?"

In other words, since this is not the correct answer to the "puzzle", why do you leave the clue "brick shape" for?

Is it trying to trick people?

Yueshui Nanatsuki complained in his heart, and Shu Yunwen spread his hands and said, "I don't know what he thinks." All in all, you have to be careful......! Forget it, I'm still walking in front, you follow me, whichever brick my foot steps on, you will follow it, don't step on the wrong one, you know?"

As Shu Yunwen spoke, he walked in front with his feet raised, and walked through the first mechanism with everyone easily, and the cadre stared at Lu who was leading to the front with one or two eyes, and smiled:

“...... It's pretty simple, and it doesn't feel like it's dangerous. If you want me to say, this little brother, we don't need to follow you all the time, it's okay to act on our own......"

As soon as the cadre general's words fell, he wanted to go forward by himself, but Shu Yunwen immediately grabbed the cadre general's bag and frowned:

"It's not dangerous? Do you really think that? Do you think the traps here are all toys?"

The general turned his head to look at Shu Yunwen, and Shu Yunwen raised his foot and stepped on the corridor he had just passed, and then he heard a "rumbling" sound from the corridor, and metal spikes appeared from the holes in the walls on both sides, stabbing towards the opposite wall.

In just four seconds, the spikes stabbed into the opposite wall, and then retracted, leaving only a little dust in the hallway.

Everyone looked at this scene, all stunned, with a look of disbelief-

What just came out of the wall were all metal thorns?

Such dense metal thorns, if you really get stabbed, you will definitely die!

What the hell is Mr. Kiichi, why did he set up such a dangerous mechanism under his own castle?

In the confusion of everyone, Shu Yunwen looked at the cadre again: "Mr. Qian, don't you want to act on your own?

"Uh...... Forget it. The cadre was sweating profusely, and retreated with a dry laugh, while Xiaolan looked worried: "...... Yunwen-san, are the other organs in the dungeon as dangerous as the ones here?"

"Hmm...... That's right!" Shu Yunwen nodded.

"Then, if Conan touches the mechanism, wouldn't it be ......" Xiaolan stammered, thinking back to the spikes just now......

Well, that would be directly dressed as a sugar gourd?