According to the ancient map found on his son's computer, after a night of comparative analysis, Luo Zhen finally determined the location of the old man's cave.

At seven o'clock in the morning of the second day, Luo Zhen drove straight to the northern suburbs of X City.

Surrounded by mountains to the north, the rolling hills are like waves, and the forests are lush and green, blocking the cold winds blowing from the northwest, making this small city not particularly cold in winter.

There are a number of karst caves scattered in these hilly areas, but most of them are hidden deep in the ravines and very few have been found. But it is undeniable that the caves in the underground world are inextricably linked.

It was a world that once you entered, it would be difficult to get out of it without considerable experience and equipment.

Luo Zhen hopes that his judgment is wrong, he hopes that his son has not made that mistake, and he hopes that his son who has strayed into a wrong path can be redeemed.

…

"Please stand here," the tour guide waved to the tourists behind him expressionlessly, and at the same time broke the microphone with his hand, "what you see now is the famous No. 5 karst cave - also known as the other cave, this is the largest karst cave in the scenic area, but also the most complex terrain, the most peculiar landscape of the cave, please be sure to follow me closely after entering, don't fall behind, if you get lost, rescuers may not be able to find you after three years." ”

The crowd burst into laughter, most of them elderly over half a hundred years old. They all wore helmets and safety vests issued by the scenic spot, holding cameras or mobile phones in their hands, and listened to the introduction of the young tour guide with great interest.

Luo Zhen carried a backpack and walked at the back of the crowd, constantly looking around at the colorful and bizarre underground world in front of him.

According to ancient maps, there is an old man's cave that happens to be located in Cave 5, perhaps in the depths of Cave 5. However, the place on the cave landscape map does not exist, so it is likely that the passage to the two caves has been blocked by rocks or artificially sealed.

"Please pay attention to the steps under your feet, let's go to the first spot..."

…

Walking through a labyrinthine cave and listening to the faint noise that has been refracted repeatedly in your ears gives you the illusion of being out of time.

As if roasted by flames, the rock flowed down from the top of the cave, forming large waves of rocky rocks. The stalactites are facing each other up and down, like the broken teeth of a spirit animal. The blue and purple lights blow by, interweaving unique patterns on the craggy stone walls, and reflecting on the surface of the underground lake that is as bright as a mirror, creating a fairyland on earth, but also making the whole cave reveal a slightly eerie feeling.

The bizarre scenery is dizzying, and the tourists are busy taking pictures, but Luo Zhen has no intention of appreciating it, and he only has apprehension in his heart.

…

After about an hour and a half of walking through the tour procession, everyone finally came to the end of the cave.

A five-meter-high white stone wall stands in front of everyone's eyes, and it looks unusually smooth, which is very eye-catching in this uneven karst cave.

A golden spotlight is installed on the ground and illuminates the stone wall, giving it a stunning glow and a sense of sacredness.

"Okay guys, this is one of the most famous attractions in our cave, it's called 'Cliff'." The tour guide explained in an orderly manner at a very fast pace, "It is not a cliff, it is a cliff that survives in a desperate place, and it is said that behind it is connected to the world of the gods, and if you make a wish on it, as long as your heart is sincere enough, your wish will definitely come true." ”

After the tour guide finished speaking, he silently stepped aside, and the tourists were willing to face the cliff or take pictures.

Luo Zhen was standing in the corner staring at the "cliff" in a daze, just now all the way over, he never found any hidden cave that could be reached and could exist, and this meaningful cliff made him start to think.

If there is another world behind the cliff, will it...

But how could a man pass through such a thick stone wall?

Luo Zhen's line of sight went from top to bottom, from the dilapidated ** on the top, to the white and golden stone wall, and finally to the golden spotlight on the ground.

Due to the lack of labor, most of the facilities at the attractions are unmaintained, and they all look dusty and even rusty.

The same is true for this spotlight, due to the long period of unattended, coupled with the dampness in the hole, the metal shell has long been rusted, and the part that meets the ground has even been dyed red into a circle.

But now, the red circle didn't fit the spotlight tightly and moved slightly.

A flash of lightning suddenly flashed in Luo Zhen's mind.

Someone has touched this spotlight!

Moreover, the spotlights are now very clean and free of rust where they fit the ground, indicating that the spotlights were moved not long ago.

"Please hurry up and take pictures, and in ten minutes we will set off for the next attraction." The tour guide clapped his hands at the crowd and shouted at the horn.

Soon, the old men and ladies lost interest in the stone wall and left in groups.

Luo Zhen took advantage of everyone's inattention just now and quietly hid in the shadows in the corner. He deliberately kept a low profile along the way, walked at the end of the line, and did not talk to anyone, just so that he could "disappear" at any time.

There is still some time before the next group of tourists arrives, enough time for him to explore a little.

Putting on his gloves, Luo Zhen began to carefully examine the spotlight. There were many fine stones on the ground around the spotlight, and Luo Zhen found that several stones far away from the lamp were also stained with rust.

This shows that someone once cut the ground under the spotlight, and the stones that were originally under the spotlight were scattered in the distance.

Could it be that there is something else underneath these stones?

Thinking of this, Luo Zhen couldn't help but feel that his cheeks and spine began to heat up, and his heart was pounding. He turned his head to look behind him to make sure that there were no staff nearby, and then looked up at the ** that seemed to have long been broken, then put on his headlamp and began to dig through the stones in front of him.

A gray square wooden door appeared on the ground in front of him.

Luo Zhen could even smell the musty smell of choking, and he wiped the dust and stone chips off the wooden door, and found that there were rusty latches on it, and it was closed at the moment.

The door is locked from the outside.

If so, the space inside is more akin to a cellar, or prison; And not just a channel.

Isn't it a little strange that there is such a place in such a tourist attraction? Luo Zhen felt a faint uneasiness in his heart.

Before he had time to think about it, Luo Zhen took out his headlamp and outdoor flashlight from his backpack. Next, he reached for the silent latch.

"Smack!"

After a leisurely muffled sound, the wooden door slowly unfolded.