The apocalypse begins with a dungeon game.

Of all the people, only Li Lan knew that he was just making a joke on a whim.

Unfortunately, this was something from Earth, and neither Shen Yuan nor the old man understood it.

However, it must be said that Shen Yuan was greatly shocked after hearing Li Can say this.

This kind of half-joking language also contains great wisdom.

When Li Can asked his name again, the old man just smiled and waved his hand, "I don't have a name."

They were all a little surprised, unsure whether he was serious or just making excuses.

Although the environment in the lower town is a bit harsh, it's not to the point where the original inhabitants can't even come up with names for their children.

"This grandpa? How come he doesn't have a name?" Shen Yuan pondered how to address the old man.

"I've had no family since I was a child, and I don't even have a name. In short, I've been a nameless person until I'm old, hahaha. But after I secretly opened a casino through connections, I started to have all sorts of titles. Most of them call me 'Boss,' or 'That Old Man.'"

His words inexplicably evoked a sense of desolation.

Originally, Li Can only wanted to take advantage of the situation and use that unreliable family genealogy to extract some information from the elderly.

Unexpectedly, he jumped directly out of the atmosphere, completely out of his control.

Li Can remained skeptical about whether what he said was true.

His physical appearance is now questionable; it's hard to say whether he's truly in his seventies or just pretending to be young.

There are too many ways to disguise oneself, and there are hardly any practical examples to refer to.

The group of people gathered together and chatted casually.

Several eerie creatures suddenly appeared in the distance, seemingly searching for something near the collapsed and demolished underground casino.

After searching around for a while, they spotted the old man laughing heartily with Li Can and hurriedly floated over.

When they got close, it was inconvenient because of the crowd. They wanted to send text messages, but they always ended up with several ellipses.

Seeing this, the old man composed himself, his expression turning somewhat solemn, and bid farewell to Li Can.

"Xiao Xing, keep up the good work. If you can rebuild the city, you'll have done a great job, and you'll definitely be rewarded handsomely in the future."

"I have some guests coming to see me, so I'll be going now. If you have the chance next time, please come and visit me more often."

He waved his hand, then turned and slowly walked away, carrying his cane.

But he was walking much faster than when he came before, and he seemed to be in a hurry.

It's unknown what the old man said to those strange creatures after he left, but not long after, the old man and the strange creatures all disappeared from the vicinity.

It was as if it had evaporated into thin air.

Li Can used the vulture puppet to fly around the remaining buildings of the underground casino. After inspecting the area, he found that there was nothing different about it.

But the old man simply vanished right there.

"Could there be a secret passage here?" It's no wonder Li Can thought this way. He had seen those strange creatures disappear instantly when the connection was pulled, but if the people of the lower city wanted to do the same, they would have to use some tricks.

He was already suspicious of the old man and paid extra attention to him; now, his interest was piqued even more.

"Brother Xing, what are you looking for?" Shen Yuan and Li Lan stood to the side, originally planning to leave together, but Li Can didn't seem to be finished yet, squatting in the ruins rummaging through them.

But they gained nothing, and after all that effort, they ended up covered in dust and looking disheveled.

"You all saw it with your own eyes just now. He just disappeared so suddenly. Did anyone see what kind of transportation he took when he left?" Li Can said while turning over the steel and concrete blocks.

Shen Yuan shook her head doubtfully, "No, it should still be nearby."

Li Lan then walked around the edge of the houses and land plots.

It looks like they're measuring the area with their footsteps, calculating the total size of the space.

But what it actually tests is the change in texture between soil and cement surfaces.

Then a hint of helplessness and confusion flashed in his eyes.

"It seems you were right. This underground casino is covered by only a small building on the surface, but the space below is huge."

"The workers' simple cleanup and demolition just now only cleared away the upper part of the house; the underground facilities remain intact."

"In fact, because the materials used for the walls, foundation, and ceiling are of such high quality, this place is indestructible and very safe."

"I estimate that the place where the old man was talking and exchanging ideas with the strange guests was the opening of the secret door in the underground area, and he moved directly from that location."

She pondered for a moment, then paused, "Or perhaps they didn't leave at all, and are still down there."

Li Can nodded. "I know that location. I've been keeping an eye on it."

The three found the location indicated by Li Can and searched for an entrance and exit in the chaotic and impassable ruins.

Before long, Li Can found a square edge piece that was different from the rest of the wall near the original ground where the house had not yet been destroyed.

He tried inserting his fingers into the soil and pulling the mechanism up with force.

However, even after expending tremendous effort, they still couldn't accomplish it.

This is clearly a passageway that people used to frequently use. It looks like there's another hidden mechanism that controls this place.

Brute force won't work; you have to rely on intelligence.

"Let's look for it." Li Can stood up and began searching the surrounding area.

Shen Yuan was puzzled. "Brother Xing, this place was originally a hidden underground casino. The secret entrance we found was probably the place where gamblers used to go."

"Even if we crack the mechanism and find a way to get to the place below, what's the use? It's just a waste of time, since the casino isn't open anymore."

Li Can was well aware that the casino had now completely shut down for repairs, and the necessity of factual evidence.

Even if this place was once just an ordinary entrance and exit, with nothing worth exploring.

But his intuition told him to keep experimenting and not to overlook even the slightest clue.

This old man must have some deep secrets waiting to be discovered.

"Looking for someone."

"Are you looking for that old man?"

Li Lan watched the two talking and coldly continued, "I guess they can't be found. They should have already left. I think the first possibility is the most likely."

"How so?"

"It is dangerous to stay in the underground space now, as there is a risk of collapse and death inside."

"If we don't consider moving to another place, it's safer to stay above ground."

"The timing of those strange appearances is also suspicious. It seems like they came to deliver a message or something, and then disappeared together. Don't you guys think...?"

This was actually the logic that Li Can had already analyzed in his mind. The cause and effect were connected, making it hard not to make connections.

It's perfectly normal for two siblings born of the same mother to have their brains functioning differently when they go outside.

Li Can never doubted his sister Li Lan's intelligence.

Shen Yuan covered her mouth, as if she had gradually come to an understanding.

"You don't mean... that nameless old man is...?"

"The old city lord who is hiding in the lower city," Li Can added for her.