After a long trek, we are not far from the ancient church in the mountains, and we will arrive at a few dozen stone stairs.

Didn't I just say that I would do my best for our team, but now everyone's luggage has fallen on me, and I don't even have a spare neck - a small satchel hanging from my heart.

The dozens of stone stairs seem a little abrupt, and it extends underground. In other words, what we saw was only a part of the stone staircase, and a section of it was buried underneath the earth—in the sand on the way we first came up—possibly covered by mud carried by soil erosion.

"Look!" Lingxin shouted. Standing on the edge of the cliff on the other side of the valley, she looked at the valley, and then patted her chest, looking frightened.

The fog was heavy under the valley, only the tops of the trees were exposed, and even when the sun came out, the fog still did not abate. Looking down on this mist-shrouded, unfathomable valley is truly chilling.

"Don't be curious, Tingxin. We're almost there, hurry up. Professor Xia glanced at Guxia lightly, then turned his head and urged Ling Xin. We are not short of time, Professor Xia is so anxious, in fact, he wants to divert Lingxin's attention and suppress her curiosity.

As soon as we went up, the church came into view. It covers a wide area, has a large scale of construction, and has a bamboo shoot-like shape. In front of it there is also a square, paved with stone slabs. The idol was right in the middle of the square.

At this time, Lingxin took her backpack from my shoulder, took out her laptop from it, and after pressing the "Enter" key, a set of scanned geolocation stereograms appeared on the screen, and there was a string of data being loaded in the lower left.

"Wind speed level: 3, light breeze. Temperature: 18°C, Air quality: Excellent. There is no anomalous magnetic field. Lingxin told us based on the results of data analysis.

"What else?" I asked.

"It's gone." Lingxin replied.

When I asked, she was a little puzzled: "The data doesn't show more information." ”

"Dad, what do you see?" Ling Xin asked Professor Xia.

Professor Xia's expression looked a little distressed, perhaps not very satisfied with what Ling Xingang said; We came here because of the anomalous magnetic field here, and now we are puzzled by the conclusion of Lingxin.

"Sen, what are you doing lying on the ground?" Lingxin asked.

"It's okay, I'm just listening to the undercurrents down there." I say.

I leaned down to the ground, and sure enough, I found some clues—there was a lot of space under the mountain, and there was a circular dark river flowing around it, and the dark river was located right under the church.

"Did you hear anything?" Listen to the heart and ask again.

"Well, yes, there's a lot of space under where we're standing now, and there's a dark river nearby," I looked at them, "and the river seemed to be moving in a circular motion somewhere underground—its sound waves expanding upwards in a spiral. ”

"Can you hear that, too?" Professor Xia questioned. He thought it was impossible, and he looked puzzled. Lingxin was also puzzled, looking forward to my answer.

"Uncle Xia, listen to the heart, you see," I spread my hand, "This is the result of my compass software's analysis, and this circle is the sound waves transmitted upward by the circular dark river underground. ”

"Hey, Sen, does your software have a human body sensing function?" Listen to the heart. When she saw me spread out her hand, the light and shadow map came out, and she guessed.

"Hmm!" I nodded, "Actually, there are a lot of problems with this technology, and after I have perfected it in many aspects, it is okay now." ”

"Alright, let's go over, there might be the answer we want in the church." Professor Xia suggested.

As soon as I picked up my luggage, they walked up the stone staircase and prepared to descend into the square.

As I was about to follow, there was a heavy fog around me, and then the chisel of bells rang out in the square.

I walked down and saw hundreds of craftsmen building the square, but I didn't see Lingxin and Professor Xia. I shook my head vigorously - the craftsmen were all neatly dressed, half a hundred years old, and the chisels in their hands were flying between the stones.

The church I was facing was still under construction—the scaffolding craftsmen were busy, some carrying the big stones that had just been lifted from the gears, some measuring the level of the load-bearing walls with ink lines, and some sculpting patterns.

They don't seem to see me, and when I'm around them, they're still busy.

They looked attentive and achieved the effect of zero error on the point, line and surface. The size of each of the stones in the square has been chiseled and measured by several craftsmen, and even with the most advanced measuring instruments, there is not the slightest flaw.

In the middle of the square, on the pavement of the unpaved pavement, there lay a boulder, tied with hemp rope as thick as a baby's arm, connected to a gear set, through a hole in a wooden frame as high as it was; Dozens of craftsmen are shaking the handles and pulling the boulder up.

"Ho-ho-ho-" They shouted slogans that shook the sky.

At that moment, a mysterious man in a robe with his head buried in his hood seemed to notice me. He walked towards me. His face hidden in his hood was blurry and black, and I couldn't tell if it was a face or not.

As he got closer and closer to me, I subconsciously took a few steps back. His face gradually cleared, and I felt a little panicked. His appearance can't be described in an exact word, it's just the kind of thing that you will never want to see again in your life when you look at it.

Suddenly, like a gust of wind, he stood in front of me, and I didn't have time to react - I saw that the hood was empty, and the sleeves of my shirt were exposed. At this point, I held my breath, and my surroundings seemed to be cooperating, surprisingly quiet. When I tried to run away, my feet felt like they were being held down by a pair of hands, and I couldn't move.

At this time, the "person" in front of me crashed into me and passed through my body, and the few wisps of black smoke left behind by him also dissipated.

"Ahh I let out a horrified cry.

When I was about to turn around and look around, the scene changed - I saw Professor Xia and Ling Xin, who had already descended to the square, waving at me.

I stared blankly at them, not far away, but I couldn't hear them. Finally, a strange wind passed by my ears, and I gradually heard them clearly: Sen, come down quickly.

"Sen, what are you doing in a daze!" The sound of listening to my heart made me suddenly feel like I was right next to me.

I turned my head to look and jumped in shock: "Lingxin, aren't you still in the square below!" ”

It was only a few seconds before and after, and I was surprised and frightened by the sudden appearance of Ling Xin beside me; Unless she could shift her shape, how could she be by my side in such a short period of time.

"What's just that? - Sen, you just looked like you were out of your body, and you didn't say yes no matter how you asked, and looked straight ahead. - Now that you come to your senses and say something inexplicable, what do you want? Lingxin said. She shook her head helplessly and went to pick up her backpack on the floor.

At this time, Professor Xia was looking at me with a frown. I spread my hands blankly and shook my head.