"Knock-" There was another muffled sound, and the vibration of the stairs was far more violent than the last time, Shi Lan and Liu Ye stood against the wall, the railing "buzzing" and shaking, and from time to time piles of ash fell from above.

"This ...... What's going on?" Liu Ye cautiously moved to the railing and looked down, "Yes...... It came from underground. ”

"Click, click, click......" A scalp-tinging cracking sound sounded, and a crack in the wall stretched from the bottom to the top, like a small sapling growing into a towering tree in an instant, but it could not support the abandoned building, but instead turned into a prophecy that it would collapse.

"Not good!" Before he had time to think about it, Liu Ye flew to Shi Lan, who was squatting with his head in his arms, and protected her under him, the entire stairwell collapsed at this moment, and a large section of cement blocks fell down the long staircase, and the two of them were drowned in smoke and falling rocks for a moment.

After a while, Liu Ye kicked away the cement slab pressed on his body, and a translucent light green mask outside his body dispersed, and he glanced at Shi Lan who was still squatting with concern, but fortunately he reacted in time, and neither of them was injured.

"Thank you...... Thank you. Shilan stood up, "I...... I just ...... myself."

"Between us, no need to say thank you. Liu Ye smiled and rubbed Shilan's hair, "It's okay if you're fine." ”

"Hmm......" Shi Lan's face flushed slightly, and then suddenly jumped like a frightened deer, looking around vigilantly, "What kind of place is this?"

"It should be the experimental area of the Tianyi Workshop in the past, but ......" Liu Ye raised his eyes and swept around, this place is more like a mine than a laboratory, the rocks under his feet are very smooth, a little damp, there are obvious traces of artificial polishing, and the black stone piles piled up in a radius of dozens of meters also prove this, "This place is different from what I remembered." ”

Twenty meters above there was a crack several meters square, it was the place where the stairwell collapsed, and not much light came in from there, and there was a row of small green lights on both sides of the crack, and not far away was a huge metal pipe? What does a radius of about ten meters look like? The small lights extend all the way into the depths of the pipe, but even if there is a light shining on it? It's still dark inside the pipes, and it's hard to see.

Don't see the Magnetic Rail Elevator? I didn't see any experiments being carried out, just a huge pile of black rocks? There is also a huge pipeline that I don't know why it was built, everything here is different from what Liu Ye remembers.

"Not coal? Not Mojing? It's not iron ore either......" Liu Ye picked up a piece from the black stone jar next to him, rubbed it gently, and a layer of black powder fell, but it didn't touch his hands? Trickling down his fingers and falling to the ground? "It's not like known ores, but it's a synthetic product, but it looks like it's still an unprocessed embryo, what the hell is this......

"Liu Ye, what do you see this?" Shi Lan pushed away a cement slab and picked up a round shiny sign, "Hmm...... The pattern above is a rabbit? And a hammer. ”

"Rabbit and hammer?" Liu Ye was stunned for a moment, where did he seem to have seen a similar icon? It doesn't seem to be, if there is no impression in your memory? "Show me. ”

"Uh-huh. Shilan obediently handed him the sign.

"......" Liu Ye held the sign and looked at it for a while, not thinking of anything.

"Not impressed?"

"None? But I always felt like I'd seen something like it somewhere...... What's the sound?"

"Boom-"

"Same sound as before!"

"On the other side of the pipe? Let's go!" Liu Ye immediately pulled Shi Lan and ran towards the dark pipe.

"Let's go, this place is going to collapse!" the young man in the black leather jacket whispered, "Liu Xia!"

The tall woman in sunglasses rolled forward, deftly onto the rooftop, took out three crossbow-like devices from her long backpack, slid two of them against the ground, and threw them at the feet of the other two.

Ye Xin lifted her toes, and the bow-like device turned up a few times, and landed firmly in her hand, and the violently shaking corridor didn't seem to have any effect on her at all.

"Meet on the roof of the opposite building. ”

After speaking, Ye Xin rushed outward, ran to the edge of the roof of the building and jumped up, and at the same time, with a slight buckle of his fingertips, the bow-like device ejected a hook claw dragging a rope and accurately stuck on the edge of the roof of the opposite building.

The hot posture drew a perfect arc in the air, and with the pull of the contraction hook claw, Ye Xin landed steadily with a somersault, and there was a rumbling sound from the building behind him, smoke and dust were everywhere, and two ropes shot out of a dusk, and hung on the cement edge of the rooftop at the same time.

"Whew-", Liu Xia landed next to Ye Xin, casually threw the long strip-shaped bag aside, raised her hand to wipe a handful of sweat, "Whew-it's really dangerous." ”

"Where's Zhang Qi?"

"Collect the gun, hey, it's coming. Liu Xia tilted her head slightly, and pointed with her chin to the approaching black shadow in the smoke and dust in front of her.

"Phew, Bah. The young man in the black leather jacket stuck out his tongue as soon as he landed, as if he had choked on a mouth full of dust.

"Hey, you're too damn bad. Liu Xia put her hands on her chest, her long hair fluttering in the wind, "For a broken gun, as for it?

"Oh, you don't understand. Zhang Qi shook his head slightly, with an expression of nonchalance, as if he didn't intend to explain.

"Don't do that next time, evacuate as soon as possible when you evacuate. Ye Xin glanced at the black piano box behind him, "Guns can't be compared to your life after all." ”

"Yes, Sister Ye Xin. Zhang Qi nodded.

"Hmph. Liu Xia snorted lightly with a little dissatisfaction.

"What was that just now? What was the sound of 'knock-' just now?" Zhang Qi picked up the telescope hanging on his chest and pointed it at the first floor of the old site of Tianyi Workshop.

The images in the telescope are automatically magnified and parsed again and again, and the infrared thermal sensor scans the smoke-shrouded first floor again and again, but no reactive targets are found.

"No...... he frowned and licked the corners of his chapped mouth, "no living creatures." ”

"This building is weird inside and out. Liu Xia shrugged her shoulders, her sunglasses slipped off the bridge of her nose a little, revealing a pair of beautiful eyes, "We made me uncomfortable when we walked up and down the first floor during the day." And there is no air conditioning on such a hot day, and it is as cold as an ice cellar inside, not to mention that it suddenly collapsed, even if it is said that it is haunted, I believe it. ”

"Whatever it is, it's none of our business. Ye Xin turned around and walked towards the rooftop gate, "Our task has been completed, just hand over the things to the client, let's go." ”

"Eh, don't care about it?" Zhang Qi glanced back reluctantly, "Sister Ye Xin, the tail hasn't been cleaned yet." ”

"They didn't see us, you wooden head, why is your mind full of troublesome ideas?" Liu Xia shook her head and sighed, "If you don't leave, maybe you won't be able to leave." ”

"Can't leave, is there any place in the world that can keep us?"

"Have you forgotten the lesson of the last time so quickly? Let me think about who took the best equipment and failed the mission......" Liu Xia raised her head thoughtfully, biting the nail of her thumb, "Hmm...... Can't remember. ”

"Hmph. Zhang Qi pursed his lips noncommittally.

The three of them left the rooftop.

"What a terrible smell. Shilan covered her nose and muttered quietly.

Only the two rows of small lights overhead glowed faintly green in the pitch-black pipes, and the air was filled with a pungent smell of disinfectant water, and the thin streams of water shallow covered the bottom of the pipes, only half a knuckle deep.

Liu Ye put his left hand on the wall of the pipe, and he could clearly feel the faint vibrations one after another, and the interval between each vibration was equal, as if something in the depths of the darkness was rhythmically tapping on the wall of the pipe.

He squinted, such a strong smell of disinfectant water proved that this place was definitely not abandoned for five years and so long, someone must have come to clean it recently, and it should not be the group of people who were on the roof just now, they have guns in their hands, and they will definitely not come to do cleaning.

But if there are people here to supervise and maintain it, why didn't anyone show up when the guards were attacked just now?

The robot broken in two at the side door of the first floor, the disappeared corpse, the remaining bloodstains, the killed guards, a gang of robbers with guns, and the strong smell of disinfectant in the underground space......

There was also a critical thread missing, the one that could tie all these threads together......

"Liu Ye, look, there are footprints here. As he pondered, Shilan stepped forward, "But it's so strange, why three rows?"

"Three rows?" Liu Ye walked to her side, looked in the direction of her finger, the pipe in front of her began to have a slight arc that sloped upward, and the water flowed to the middle to form a thin line of arms, and there was a series of footprints where it was not covered by water, a pair was relatively small, while the other row of larger footprints only had the right foot, and the left foot was missing.

"Two people?" he crouched down and measured the size of the two footprints with his fingers, the smaller one was about thirty-seven yards, which should have been the footprint of a woman, and the larger one, which was about forty-four yards, probably the footprint of a tall man.

"Why do you have only one foot footprint?" Shi Lan tilted her head slightly, "Is it because there is a person who only has one foot?"

"I don't know, let's shoot it first. Liu Ye turned the bracelet to aim at the position of the footprints, "Maybe it will be used in the future." ”

"Anyway, we've been walking for so long, why haven't we heard that 'knock-knock-' sound again?" Shilan curled a lock of hair with one finger, "I haven't heard it since I entered the pipe, and when I was outside, I felt that the sound was coming from the other end." ”

Liu Ye couldn't answer, indeed, that strange voice disappeared after they walked into the pipe, and the sudden collapse of the stairwell should have something to do with that sound.

But after walking for so long and not seeing the owner of the voice, he couldn't help but feel a little uneasy in his heart. The sudden silence may be that the other party has already arrived, waiting for the prey to enter the abyss from which they will never recover.

He is not afraid of head-on conflict, but the most terrifying thing is always the unknown.

I don't know where the opponent is, or even where the opponent is, this is what Liu Ye is most worried about.

But at this time, there seems to be no better choice than to continue to move forward, do you want to turn around and leave?

It seems like...... It's not impossible, this time it came in a hurry, and there were so many accidents, it's better to go back and prepare well and then investigate.

Once the intention of retreat sprouts, it will continue to grow in his heart like mushrooms after a rain, and Liu Ye suddenly fell into hesitation.

"Zi~Zi~" The bracelet suddenly vibrate, it was a call from Zeng Chen.

"Drop. Liu Ye and Shi Lan put on their headphones and turned on the switch.

"Hey, hey, can you hear me?"

"What's wrong?"

"Phew—it's finally connected. On the other end of the phone, Zeng Chen let out a long sigh, "I just checked your location, and found that the location signal was actually lost, and the phone has not been able to get through, where are you now? Why is the signal so bad." ”

"Uh...... We are underground, at the site of the Tianyi Workshop. Liu Ye replied in a low voice, "The stairwell has collapsed, and we are looking for clues." ”

"The stairwell collapsed? With the level of construction there, it doesn't make sense in just five years...... Someone must be playing tricks, be careful. ”

"We'll take notice. Shi Lan said, "Zeng Chen, you are in a hurry to contact us, do you have anything to tell us?"

"Oh, by the way, there are indeed two pieces of news for you. ”

"What is it?"

"Good news and bad news, the good news is that girl with red hair, she's awake. ”

"Wake up!" Liu Ye and Shi Lan looked at each other in surprise, "Did she say anything?"

"This is the bad news, she doesn't seem to remember anything, not only the memory of the event, but also some intellectual memory. ”

"Intellectual memory?" Shi Lan had never heard of this term.

"Yes, she barely remembers the language or the words, for example, but she gets along well with Mona now. Zeng Chen replied, "These two types of memories are divided into different areas of the brain, and if they are both lost now, it may be that she has been injured more seriously than we thought." ”

"Amnesia...... Liu Ye thought for a moment and asked, "Since she is awake by herself now, does it mean that the possibility of being cursed does not exist?"

"That's right. ”

"Does that mean it has nothing to do with magic?" asked Shilan.

"I can't say for sure yet, but I don't think it's related. By the way, are you in the Tianyi Workshop? I have a ...... here. Beep-"

The signal was interrupted.

"What does Zeng Chen want to say?"

"I don't know, I want to show him the footprints. Liu Ye bit his lip, "I can only wait until I get to a place where there is a signal." ”

"Liu Ye, I still have a question to ask. ”

"What?"

"How can there be footprints in such a place?" Shi Lan said, pointing to the three rows of footprints in front of them, "This pipe is all made of metal, how can ordinary people step on such obvious marks in such a place?"