In the dark and damp underground space, Sudo Yunzo led everyone to trigger the mechanism and entered a long passage, and the sound of water could be faintly heard.

"Joto," Conan found the broken Gao Cheng and whispered, "Did you find out just now?" That woman should be ......"

"Leave it alone."

Gao Cheng shook his head slightly, and looked at the wooden board on the top of the passage by the flashlight.

"The floor here is wet, and there's water...... "Ayumi who was walking in front suddenly shouted.

"It's the wooden planks on it that are misaligned," Sudo said, looking at the leak in the ceiling, "It is said that there was an earthquake here before, and the foundation of the house was skewed, so the groundwater gushed out......

"Earthquake?"

"Hmph," the old woman said with a smile, "as Yoshimaemon said, this is Nioh-sama's anger, so let's stop looking for any treasures and go back quickly!" ”

"If you want to go back, it's you, the old woman, right?" The short-haired woman walked past the yin and yang old lady, ignoring the water-soaked floor.

"Hey, Joto," Xiao Ai retreated to Gao Cheng's side with Tamai Teruma's notebook, "The note seems to be dry, 'met a bad guy...... will be killed...... If you don't hide the stone you find, you'll be killed...... ...... by the poisonous rat who wanted to kill his companion and swallow the treasure alone', the page behind it was torn off......"

Conan frowned slightly: "So the poisonous rat is ......"

"It's hard to say until the end."

Gao Cheng stepped forward and continued to keep up with Sudo Yunzo.

After seeing so much and listening so much, a line gradually connected in his mind.

Treasure, a treasure hunter killed by his companions, Kidd mentioned in the notes......

If he's not mistaken, Kidd might have been here and had unlocked the code to find the treasure, but something seemed to have happened in between.

"Boom!" Suddenly there was a sound of waterfall flowing in front of me, and I saw eight red waterfalls gushing out of the hole outside the passage and converging together, and the water vapor was steaming.

"It's a hot spring waterfall ......"

The group descended the stone steps and followed Sudo to find the exit hidden by the steam.

"Why is the water red?" Motota walked to the pool in astonishment.

"It may be that it contains more iron."

Gao Cheng intervened his hands and looked at the forked water, which, like the waterfall, had a total of eight forks leading to the unknown cave.

"City ...... This little brother, the exit is here. The old lady stood at the exit and reminded.

"Wait a minute," Gao Cheng took Conan to look around, "I remember you Japanese...... There is a legendary yokai in Japan, called Yachi, right? ”

"Eight Miscellaneous Snakes?"

"That's right," Conan continued, "it's the legendary serpent with eight heads and eight tails, you must have heard of it, right?" The story of Amaterasu's younger brother who got a certain yokai drunk and subdued it in order to help Ki Inada Hime, came out of the tail of the Yachiki Orochi, which was later called the Grass Pheasant Sword. ”

"...... so"

Sudo Yunzao took a look at the entire hot spring with hindsight.

"Ju, is it actually the Eight Miscellaneous Snake, the waterfall is the head of the Great Snake, and the tributary is the tail? Damn, I didn't even notice when I passed through here! ”

"In that case, the Grass Pheasant Sword is somewhere in the tributary?"

"Yes, the myth says that the sword is the tail that appears in the middle, so it is either the fourth or the fifth tributary, and there should be a grass pheasant sword hidden in it......"

"Hey, are you going to dive into the hot springs?" Sudo looked at Conan, who was groping, and swallowed lightly.

Is this really just a bunch of ordinary kids? I am willing to be more or less willing to be a burden like this......

"Little ghost," urged the old woman, "it's just a coincidence, and if it's the bottom of the valley, you'll die......"

"No," Conan said as he walked over to the stone wall, "there seems to be a mechanism here." ”

"Imp!"

"Click!"

Conan inspected it for a while, calmly pressed down on a stone, and suddenly a tributary in the middle of the water became shallower, and as a stone slab rose up, the flow broke off, revealing a black cave at the end.

"There's no water!" Motota was surprised and walked to the dry passage, "It seems that you can go in inside......"

"Genta!"

"Get out of the way!!"

The old woman violently pushed Yuan Tai away, and rushed into the cave like a demon.

"Haha! It's really a grass pheasant sword! ”

"What the hell," snorted the short-haired woman, "this old woman is really here for the treasure!" ”

The cave is also a basement, and there is a stone sword inserted in the stone tablet opposite, but the old woman did not rush through, but only stepped into the stone room when she was attacked from all directions by flying axes, and was almost dismantled.

Gao Cheng followed behind everyone, and at a glance saw the old woman who had escaped the catastrophe and was lying on the ground panting.

In the face of the dangerous dilemma, Conan walked into the stone chamber with ease, grabbed the hidden handle on it when the axe attacked from all sides, and jumped across the stone chamber to the stone tablet with the returning axe.

"What's the word on it?" Gao Cheng asked.

"Dragon, the word 'dragon' is engraved on the sword."

Conan looked at the stone sword and silently returned to the crowd with the flying axe.

"Dragons?" Sudo looked at Conan nervously, "Kid, do you have any ideas?" Yong, Yan and dragon mean ......"

"Isn't that tombstone written?" Conan thought for a moment and smiled, "'O confused man, offer me an artifact'...... So the key is the Sanshui of Sanshui Yoshimaemon, and the words of Yong, Yan and Long plus Sanshui ......"

"Swimming, light, taki?"

After a while, everyone left the underground and appeared outside the old mansion, thinking hard about the meaning of the code.

"Okay, it's just Yoshimaemon kidding," the old woman muttered as she looked at the night sky, "It's so late, hurry up and get down the mountain, this kind of ghost place shouldn't come to ...... at all"

"That's right," echoed the short-haired woman, "I'll take my leave here......

"Don't be so careful," Gao Cheng stopped a few people, "I think, you should all unlock the code, right?" ”

The short-haired woman's face changed slightly, and she stopped: "How could it be......"

"If not, why bother with the others?" Gao Cheng smiled, "You don't look like treasure hunters who give up so easily......"

The short-haired woman's eyes trembled: "Hmph, it deserves to be the famous detective Chenghu Gaocheng...... This kind of code really can't bother you, since there is nothing to hide. ”

Xiao Ai glanced at Gao Cheng lightly.

It's nothing else, it's strange that Gao Cheng can unlock the code......

"That's right," Xiao Ai walked in front of Gao Cheng to meet the short-haired woman's gaze, "Now that we know the key information, the code is naturally nothing to hide, the closest to the sun is Mercury, the old people are carp with beards, and the land of abundance is a place where the sound of water is endless, that is to say, the treasure is next to the waterfall where there are many carp swimming in the fresh water......"

"Little sister is very good," said the short-haired woman noncommittally as she walked to the edge of the pond waterfall, "but it seems that we are all busy in vain, and it seems that the guy has preempted us, you look here." ”

"A card with a knife nailed to a stone...... It's Kidd the Thief! ”

Sudo Yunzao sighed regretfully: "I was actually preempted by that guy!" ”

"Kidd?"

Gao Cheng quietly walked to the side and also found a card that read "The Stone of Nioh has been worshipped".

His gaze swept over a few treasure hunters who were about to leave, Gao Cheng's eyes condensed slightly: "Are you going to give up?" I don't think the treasure was taken by Kidd......"

"What?!" The old woman's expression changed drastically, and she looked at Gao Cheng along with everyone.

"Didn't get taken by Kidd? What does this mean, Detective Joto? ”