To dispel his doubts, Mark took out a hose and handed it over.

"Hold this tube, it will allow you to breathe and it won't drown."

The hose is tied in a first aid kit to stop bleeding. It's not rough, but it's enough to sustain breathing.

Valen looked puzzled, and after blowing twice, he looked at Mark.

"Will this thing work?

Mark smiled and said to him, "Don't worry, it's connected to me and enough to provide oxygen." As long as you hold on to the rope and follow closely behind you. I'll watch you. ”

Only then did he dispel his doubts and go into the water immediately.

Valen's body was heavy and he couldn't dive, so he choked on a few mouthfuls of lake water and quickly sank to the bottom.

Pulling the rope, try to "swim" towards the hole.

At first, I didn't believe that the hose supported my breathing, so I tried to hold my breath as much as possible.

However, I held my breath hard, and after drawing a scoop with a gourd, I got some tricks to breathe freely.

Valen is too large and consumes more oxygen, and the mech's oxygen reserves are insufficient.

After several puffs, Valen felt dizzy, and panic caused him to lose his mind, and his hands and feet began to scribble.

A large string of bubbles floats, and when he realizes that Valen is about to drown, Mark can only drag him to swim forward desperately.

The pipes are long and dim.

Valen had reached the peak of his breath holding, choked on a few mouthfuls of lake water, and desperately hugged Mark.

The drowning person will be entangled to death, and the hands and feet of the rescuers will be tightly wrapped, resulting in both drowning.

Mark was helpless, clung to it, unable to move.

If this stalemate continues, the oxygen in the mecha will run out, and the two will be buried at the bottom of the lake together.

In desperation, he slammed into the artery in Valen's neck.

Knock him unconscious, leaving him in a coma and no longer struggling.

In this way, he broke free from the entanglement and swam forward as hard as he could.

The water was so dark that the searchlight could only shine a few meters away, and Mark swam forward by feeling alone.

Pillars of light shoot through the water, seemingly to the end.

"Poof", the two emerge from the water and find themselves in a pipe that resembles a sewer.

Water in the pipes overflows the chest and becomes shallower as you walk.

Dragged Valen's body with all his might, causing him to breathe air.

Mark crouched down, let Valen's stomach rest on his knees, and slapped him on the back, causing him to vomit out of the lake.

In the midst of vomiting, Valen gradually recovered.

For Valen, who has never dived, these two minutes are definitely an indelible memory.

"Valen, are you alright?"

"Ahem! Cough! Can't die. Looking around, Valen's eyes widened like brass bells. Where is this? ”

"We're in." Mark tried his best to contain his agitation and looked around with a searchlight.

"This place is the 'magic box'? I don't think it's anything unusual. ”

Mark barely managed to squeeze out a smile, and after losing his radar, he had to rely on his senses to analyze the environment.

He opened his mask and said to Valen, "Shhhh Be careful. The monsters on the outside are hard enough for us, and I'm afraid it's not that simple inside. ”

"If you're afraid of death, go back! I don't know what to toss around. "Valen almost drowned, and there was nowhere to release a wildfire.

"Be careful to sail the ship of ten thousand years." Mark kindly reminded. "It's almost time to go. Laurenna is still waiting for us. ”

At the mention of Laurena, Valen was full of energy, checked that the "shield" given by the princess was there, and muttered: "Let's go!" Take some ghost source, and go back......"

"The source of life! There is no ghost source. After getting along with everyone for a long time, Mark found that he was "close to Zhu is red, and close to ink is black".

The two of them explored the sewers.

"There's light up there!" Valen poked the mech with the handle of his axe.

There was a glimmer of light overhead.

Mark looked up, and it turned out to be a manhole cover.

"You're squatting!" Not tall enough to lift the manhole cover, Mark came up with a way.

"Why is it always me?" Valen muttered, but crouched down on one knee.

Stepping on his knees, Mark lifted the manhole cover and climbed up.

Looking around, there was no one else, and he shouted at Valen, "Next time you go up first, how about it?" ”

"That's pretty much it."

The two enter a space.

The space suddenly opened up, and the air smelled rotten.

Judging from Valen's expression, it was extremely uncomfortable.

Mark, on the other hand, enjoys the protection of the mecha breath filter.

Although the searchlight is bright, it is not as good as other light sources.

It only emits light in the direction it faces, and its width is limited, making it difficult to detect certain corners in the dark.

Although the searchlight is bright, it is not as good as other light sources.

It only emits light in the direction it faces, and its width is limited, making it difficult to detect certain corners in the dark.

I found myself in a bedroom, specifically someone's bedroom, with a wardrobe or something like a wardrobe in addition to the bed.

A human skeleton was spread out on top of the bed.

The environment is so bad that the bones are gray-black and the bones are neatly arranged, and it should not be accidental death.

Mark didn't look too much into how the man died.

Textiles such as bed sheets had long since decayed, and there was no useful information to be provided other than a collapsed bed frame.

Mark looked around the room and noticed a metal nameplate on the wall.

The nameplate text is clear, the meaning is obvious, concise and clear.

After wiping the dust away, a map appeared.

The map shows the floor numbers, the size, orientation, and purpose of the passages and other rooms.

At a cursory glance, 43 of them should represent the forty-third floor where we are currently located.

In this level, there are as many as ten laboratories!

There are three storage rooms, one security department, one archives management room, and dozens of other bedrooms.

There is a large blank space left in the structure diagram, and I don't know what it means.

Valen was in the dark, and could only see through the afterglow of a searchlight, so he had to follow Mark.

Seeing Mark looking at the nameplate, he looked around and said, "This place is quite creepy, it's so dark that you can't see anything, if only I got a torch or something." ”

Valen's suggestion was good, and the multiple lights were easy to observe, and he said nonchalantly, "You wait, I'll find out if there is anything I can make a torch." ”

The two searched the room for something resembling a stick.

Suddenly, I caught a glimpse of a cabinet.

In ecstasy, he opened the cabinet and rummaged through the things that could be used.

The cabinets are quite old, the patent leather has fallen and has corroded in some places.

The locks rotted, and with a sharp pull, the door was opened.

A musty smell rushed to his nose, and the scattered dust choked Valen to cover his nose, and he kept fanning the wind with his hands in order to spread the musty smell.

Mark rummaged through the cupboard and found that most of the clothes had rotted into pieces.

A pile of books in the corner was glued together, and there was no material suitable for making torches.

Flipping through these books, the outer layer of books is rotten, and it falls off at the touch of your hand.

Several of them are well preserved and legible.

One of the plastic seals is in excellent condition.

There seemed to be a clash in the middle of the paper, and Mark flipped through it, and a photo of a man and a woman fell with it.

The photo was not taken naturally, and the two were spliced together through editing, and there are obvious traces of pasting.

In order to keep it from falling off, the owner of the photo also deliberately sealed the plastic.

Mark opens the title page with the inscription: Dr. Colin.