The three of them stepped onto the dark, damp stairwell.

The handrails of the staircase are covered with a layer of reddish-yellow rust, and the white tiles on the floor have now turned a dull yellow, like a bathroom toilet trough that has not been cleaned for a long time.

When Wang Yu and the three of them came to the second floor, the clear footsteps they had heard on the first floor suddenly disappeared without a trace.

The layout of the second floor of this building is very different from the first floor, and from the staircase there is a straight corridor that runs through the left and right.

Because the previous sound came from the left.

So the mobile phone flashlight in Wang Yu's hand shone to the left: "Little brother, is it you?" ”

He shouted twice to the left side of the hallway, but did not hear an echo.

At this time, there was another "knock knock" footsteps on the third floor.

"Uncle Cousin, up there!"

"Let's go!"

Wang Yu was the first to stride forward.

But when the three of them reached the third floor, the footsteps disappeared again.

Then footsteps came from the fourth floor.

They rushed up to the fourth floor, and the footsteps reached the top again!

The three of them continued to run upstairs in hot pursuit.

However, at the end of the staircase, an enclosed wire mesh door blocks the exit.

Wang Yu took two steps back, raised his arm to protect his head, and smashed through the iron mesh door with his hand crutches and the strength of his whole body.

When the three of them came outside, they still didn't see any figures, only a black bag on the edge of the rooftop.

Liu Zihang ran over and picked up the bag back: "Uncle Cousin, look." ”

"It's his bag!" Ning Xue recognized at a glance that this was the backpack of the young man in white, after all, when she was in the service area before, the young man in white used this bag to repel the young monkey that attacked her.

Now that this backpack has broken a shoulder strap, coupled with the fact that it has fallen on the edge of the rooftop, Ning Xue is very worried about the situation of the teenager.

Wang Yu looked at the backpack solemnly: "That boy's situation is not optimistic, he looks like he has fought with someone." ”

Liu Zihang asked, "Is the footsteps we heard earlier his?" ”

Wang Yu wasn't sure, he walked forward alone to the place where the bag fell on the edge of the rooftop.

There is no guardrail on the roof of this grain and oil center, only a brick fence less than 20 centimeters high.

Wang Yu stood behind the brick fence, leaned forward slightly, and the flashlight in his hand looked down.

Although it is only four stories high, the fog is so thick that you can't see the bottom of the building at all, and you feel like you're looking into an abyss.

Just when Wang Yu was concentrating on looking down, he suddenly felt that someone pushed him behind his back, and then the whole person lost his center of gravity and fell out!

"Be careful!"

Ning Xue, who was standing behind Wang Yu, didn't think about it, and grabbed Wang Yu's hand reflexively.

Ning Xue was also dragged off the rooftop together.

"Uncle Cousin! Officer Ning! ”

Liu Zihang saw that the two of them were working hard in a blink of an eye, and they fell downstairs one after another, and they were about to go crazy at that time.

Fortunately, when he ran to the edge, he saw Ning Xue holding Wang Yu with one hand and the outer edge of the rooftop with the other.

"I'll pull you up right away!"

Liu Zihang used his strength to feed, and finally pulled the two back to the rooftop.

"Ning Xue, thank you." Wang Yu was very moved, if it wasn't for Ning Xue's timely rescue regardless of her own comfort, she would have fallen from the fourth floor, and even if she didn't die, she would probably be crippled.

"As long as you're okay." Ning Xue wiped the fragrant sweat on her forehead and said lightly.

"Uncle Cousin, you should thank me too, right? I, a disabled person with a prosthetic hand, am tired of pulling you up. Liu Zihang panted on the side and said, "But then again, how could you fall so carelessly?" ”

Wang Yu swept around with a solemn gaze: "It's not that I'm not careless, but someone pushed me behind my back." ”

Liu Zihang and Ning Xue also became vigilant immediately.

But on this huge rooftop, apart from the three of them, how could there be anyone else?

"Something is wrong with this building, we need to get out of here quickly."

Wang Yu didn't dare to stay any longer, he took Liu Zihang and Ning Xue back to the stairwell.

Thankfully, there were no more moths when they went downstairs, and the three of them left the building without any problems, and came to the opposite street.

"Uncle Cousin, let's open this bag and take a look." Liu Zihang said.

"It's a bit of an invasion of privacy, but we're here to save people. We need to get to know the teenager better and figure out why he got out of the car alone. Ning Xue also said.

Wang Yu also had this intention, so he handed over the mobile phone flashlight to Liu Zihang, and then opened the backpack with both hands.

There was a bottle of water in the backpack, a loaf of bread, and a blue coat.

The sundries that Wang Yu took out were also stuffed into Liu Zihang's hands.

"Oh my God! That guy looks clean, but he's actually scruffier than me! This piece of bread is moldy, and I am reluctant to throw it away. ”

Liu Zihang took the bread and turned it over: "The time on this bag shows that this is the bread produced more than two months ago." Could it be that the kid has a quirk and likes to eat expired and moldy bread? ”

Ning Xue said: "Maybe this piece of bread has an extraordinary meaning for him, for example, it was given to him by a very important person." ”

Liu Zihang nodded: "It makes sense, I've only heard of someone who likes to drink expired milk, and I haven't heard of someone who likes to eat moldy bread." ”

Wang Yu finally took out a notebook from his bag.

There are a lot of newspaper clippings in the notebook, all of which are missing person notices published in newspapers.

Ning Xue said curiously: "What is that boy doing collecting the missing person notices of so many newspapers?" ”

Wang Yu carefully read these missing person notices and found a big problem!

These missing persons are all of different ages and genders, and span a long period of time, from a few months ago to more than a decade ago.

But all the missing people have one thing in common, that is, they all disappeared on the Qinling section of the national highway!

Some of these missing people were on expeditions and mountaineering, but most of them were only passing by by car.

Ning Xue frowned and said, "If we can't get out of this place, and people from the outside world can't find us, then wouldn't we end up being the same as these missing people with missing notices?" ”

Liu Zihang was surprised: "Speaking of which, that kid already knew that we would get lost today?" That's why he's so calm? Won't it ...... Could it be that the reason why these missing people on the body search notice disappeared also has something to do with him? That makes sense, no wonder the previous surveillance captured what he said to the driver. Maybe it was at that time that he misled the driver to go the wrong way. No wonder as soon as he arrived in this town, he was in a hurry to get out of the town by himself......"

"Okay, don't talk about it more and more outrageous." Wang Yu stuffed things back into his bag and said, "That boy doesn't have the smell of a criminal. ”

Ning Xue also agreed with Wang Yu's opinion, on the one hand, naturally because as a criminal policeman, she has rich experience and keen intuition that can distinguish between criminals and ordinary people, and on the other hand, it is naturally because the young man in white once rescued her.

"Maybe the boy collected these similar missing person notices because he had relatives and friends who had suffered the same thing," she said. ”

Wang Yu said: "I actually think what you think in my heart. ”

Liu Zihang suddenly said: "You mean, that kid also has relatives and friends who have disappeared on this section of the Qinling National Highway?" ”

Wang Yu nodded: "Anyway, we have to find him first now." ”

The three of them got back into action.

In the process of looking for the young man in white, Liu Zihang kept asking questions.

"Uncle Cousin, why do you think this town was abandoned?"

"There are many reasons why a town is abandoned, such as a town built on natural resources. For example, those oil towns, coal towns, and steel towns, once the resources are exhausted, they will be quickly abandoned. There is also a situation of politics. government policies, such as the Three Gorges Resettlement Project, and so on. ”

Wang Yu changed his words and said: "But what I just said is a conventional active situation. ”

"And what else is there for unconventional passivity?" Liu Zihang asked curiously.

"Plague!"