Nuan Nuan saw that her grandfather was very anxious, so she said what she thought in her heart: "According to my wishes, let me take the probe to look for it, enter from the manhole near the school, and call Brother Xiaohu as well, he will recover behind the person, and his nose is more smart, see if I can find Dr. Ou." ”

For the sake of Dr. Ou's safety, Lin Guoli finally agreed to Nuan Nuan's request.

Out of the command center, Lin Guoguo went to the Science and Technology Building to get a portable evil spirit detector, and then drove Nuan Nuan to the school gate.

Nuan Nuan waited for Brother Xiaohu at the school gate, Nuan Nuan told Brother Xiaohu about Dr. Ou's arrest, and Brother Xiaohu agreed to go to Dr. Ou with Nuan Nuan without hesitation.

Nuan Nuan left the school gate with her backpack and Brother Xiaohu and walked towards the street where the manhole was located.

Lin Guoguo watched them leave, and then went into the school to ask Teacher Liu Lei to ask Nuan Nuan and Xiaohu for leave.

Ten minutes later, Nuan Nuan arrived at the place with Xiaohu, and then Nuan Nuan opened the manhole cover.

A foul smell hit his face, almost causing Nuan Nuan to vomit.

Nuan Nuan pinched her nose and said, "Brother Xiaohu, this environment is a bit bad, in order to find Dr. Ou, you have to endure it." ”

Brother Xiaohu patted his chest and said: "Dr. Ou is our science and technology teacher, in order to save him, even if he goes down the knife mountain and the sea of fire, I am willing." ”

"Brother Xiaohu, you are doing well, then you will go down now." Nuan Nuan smiled wickedly at Brother Xiaohu.

"Ahh It's too stinky, no gas masks, how can it go down? Brother Xiaohu pinched his nose and stepped back again and again.

"You see you were so impassioned just now, and now that you're really going down, why are you going back? Of course there are gas masks, I'll give them to you now. ”

Nuan Nuan said as she put down her backpack and opened it.

Nuan Nuan took out the soul killing gun in her backpack and handed it to Brother Xiaohu, then took out two more gas masks and handed one of them to Brother Xiaohu.

"Nuan Nuan is really thoughtful and has brought so much equipment." Brother Xiaohu touched the soul killing gun and said.

He was curious, and at the moment he was aiming, planning to shoot it.

"Xiaohu, don't try it, there are only ten bullets in it, use one less one." Nuan Nuan hurriedly stopped Brother Xiaohu's urge to try the gun.

Xiaohu smiled at Nuan Nuan, and then put the gun away.

Nuan Nuan and Xiaohu escaped into the sewer, it was dark below, Nuan Nuan turned on the flashlight and handed it to Brother Xiaohu, and then she took out the evil spirit detector and turned on the switch on it.

"Brother Xiaohu, I forgot one thing, you are wearing a gas mask, how can you follow Dr. Ou's scent to pursue him?" At this time, Nuan Nuan remembered such an important issue.

"Then every time I get to a fork, take the mask off." Brother Xiaohu said helplessly.

As they walked along, a large rat suddenly appeared and ran away from under their feet, startling Nuan Nuan and Little Tiger.

"Nuan Nuan, you are so timid, you were scared by mice." Brother Xiaohu quipped.

Nuan Nuan glared at Brother Xiaohu through the mask, and then said: "Don't laugh at me, aren't you scared, these dead rats suddenly appeared, we were defenseless, it is normal to be scared." ”

They pursued it all the way, and every time they reached a fork in the road, Little Tiger endured the stench in the sewer, took off his mask, sniffed the scent left by Dr. Leo in the sewer, and then found the right direction. This can make Brother Xiaohu miserable, the sewer is too smelly, there are too many toxic gases, and he almost stinks several times, but fortunately, Nuan Nuan took action in time and used his mana to help him eliminate the poisonous gas he inhaled.

Brother Xiaohu is also powerful, and the routes he finds out are all correct.

Time passed minute by minute, and when they were looking for a fork, Brother Xiaohu took off his mask again, and did not feel the smell of Dr. Ou.

"Dr. Ou's scent is missing." Brother Xiaohu said helplessly.

Nuan Nuan looked behind her and said, "Maybe they went up from somewhere behind us, let's go back." ”

After walking back for a distance, they stood under a manhole cover, and Nuan Nuan said, "Brother Xiaohu, you shine the flashlight on it, and I'll see if I can find any traces of them going up." ”

Brother Xiaohu took a flashlight and shone it, but found no traces.

Then they looked down and finally found something underneath the third manhole cover.

The soil at the mouth of the well has been turned over and there are a pair of footprints.

Nuan Nuan looked at it and felt that it was left by Dr. Ou.

"Xiaohu, that's where they went up, I'll go up first to check the situation." Nuan Nuan said to Xiaohu.

A white light emitted from Nuan Nuan's hand, and a large gap was opened in the manhole cover.

Nuan Nuan made a silent gesture to Xiaohu, and then she saw the weeds outside through the gap.

Nuan Nuan listened carefully, but didn't find any sound.

With a wave of her hand, Nuan Nuan removed the manhole cover, revealing the blue sky outside.

Nuan Nuan climbed up cautiously, and then quietly exposed her head to check the surrounding situation.

There were weeds more than a person tall all around, and weeds in one direction were clearly trampled on.

Nuan Nuan climbed up with confidence, and then she stretched out her hand to pull Xiaohu up.

They took off their gas masks and breathed in the fresh air.

Brother Xiaohu was about to speak, but was quickly stopped by Nuan Nuan.

Nuan Nuan gestured to let Brother Xiaohu follow the direction of her finger.

Nuan Nuan pointed in the direction of the abandoned factory in the distance, and at this time a sound came.

"Let's go over and take a look, you can see the weeds that have been trampled down here, obviously leading to the abandoned factory, and I suspect that the evil spirit caught Dr. Ou in the abandoned factory." Nuan Nuan said in a low voice.

Brother Xiaohu nodded, expressing his agreement with Nuan Nuan's opinion.

Nuan Nuan put the mask off back into her backpack, then walked towards the abandoned factory in the distance with the evil spirit detector in one hand and the spirit killing gun in the other.

Brother Xiaohu was holding the spirit killing spear and was very nervous.

Nuan Nuan gave him an encouraging look and told him not to be nervous.

It was quiet here, they walked cautiously, and as they approached step by step, Nuan Nuan heard the voice, but it was not very clear to the ears.

They were still fifty meters away from the factory wall, and Nuan Nuan was clearing the grass when they saw a man in black come out of the guard room.

Nuan Nuan and Xiaohu hurriedly stopped advancing, Nuan Nuan adjusted the alarm on the evil spirit detector to vibrate, and then handed the detector to Brother Xiaohu and gestured to Xiaohu.

Brother Xiaohu understood what he meant, Brother Xiaohu took the detector and aimed it at the man in black, and then under Nuan Nuan's signal, he pressed the switch above.