On a secluded street, the houses on the left and right sides look like they are some years old.

According to the address analyzed earlier, the three of them soon came to a house.

The old house is probably a hundred years old, and the European architectural style looks so simple and solemn.

Stepping on the cobblestone steps, the three of them came to the door.

The door of the seemingly ancient building is still a safety lock.

This smart lock must provide a password and fingerprint, otherwise the alarm will be activated.

"This building looks ordinary, but I'm afraid it's not that ordinary."

Tang Yi stood at the door, checked it, and said to the two women.

This seemingly ordinary wooden door is cold to the touch.

Obviously, this is an iron gate, but it is made in the shape of imitation wood.

Looking at the window, it's the same, especially the opaque glass, which turns out to be bulletproof glass.

So this ordinary residence is actually not ordinary, it is definitely at the fortress level.

"My teacher has a lot of friends, and I have only seen a small number of them, and there is one of them, who specializes in defense, and he only participated in the research and development of B2, and then he was obsessed with traps, and I am afraid that this is from his hand."

Shen Mengyao didn't know who those crazy old men were, but each of them was an absolute king in a certain field.

With such a tight defensive equipment, I am afraid that it will only be the tip of the iceberg.

Otherwise, it will not be used for many years, and in such a chaotic city, it will still not be destroyed, and there must be secrets in it.

"It's not going to blow it up, are we?"

When he was underground, Lee Yoon-ke heard a lot about the professor.

For the sake of research, he almost blew up the school building, and almost poisoned all the students in order to give a lecture to the students.

Li Yun, who listened to all kinds of strange things, had palpitations.

"Probably not, but the professor didn't leave a password."

Looking at the combination lock on it, Shen Mengyao was also a little worried.

Especially since the professor didn't leave a password, how could she get in?

"Try fingerprints, maybe they work."

After seeing the professor's password, Tang Yi didn't think Shen Mengyao could guess it.

Fortunately, in this lock, it is a fingerprint password double input.

Shen Mengyao nodded, in fact, she didn't know what she would become if she failed.

After all, the brains of those crazy guys can never guess.

"Dididi!"

Just as Shen Mengyao pressed her thumb on the fingerprint reader, the red light flashed.

The entire iron door slowly opened.

"The professor has taken your fingerprints as well, and it looks like he's planning to bring you here."

Li Yun said in surprise as he walked inside.

And when they walked through the gate, they were shocked to find that this seemingly ordinary gate was actually more than 20 centimeters thick.

The gate is made entirely of steel plates, enough to withstand the bombardment of a single shell.

"Boom!"

The door closed behind him, and the lights in the room came on automatically.

In front of me was a seemingly ordinary arrangement, with a layer of dust on the tables, chairs, benches and sofas.

"No matter how you look at it, it's also a private house!"

The surrounding furnishings are no different from ordinary people's homes.

Li Yun stepped forward and touched it, and his hands were full of dust.

It seems that no one has been in this house for a while.

"Let's see."

The whole house is a three-storey building with European furniture, and the guest rooms also have comfortable beds.

Tang Yi stepped upstairs and took the lead in searching.

Six bedrooms, three utility rooms, all kinds of furniture.

Lee Yoon also searched the kitchen and storage room and didn't see anything wrong.

There is nothing but dust.

Shen Mengyao's attention was placed in the study.

There are three shelves full of books, but there are no scientific books.

There are kitchen recipes, children's books, and some business books.

I searched and searched, and I didn't find anything wrong.

"That's weird."

The three of them returned to the living room on the first floor.

I searched carefully, but I didn't find anything at all.

If it weren't for the unique shape and sturdy structure of this gate, I am afraid they would have really thought that they were on the wrong path.

"It's very strange, why would such a good defense system protect an ordinary person's family, this is absolutely wrong."

Tang Yi sat on the sofa, knowing that something was wrong, but he couldn't find any problems.

Every room was searched, even the corners.

There were no switches, no mechanisms, and the three of them were stunned.

"This is the only one that proves that there must be a scientist living here."

Li Yun sighed and looked at the portrait of Einstein on the wall.

There is also a line under the portrait, which should be a famous quote from him.

"Working non-stop on the support of a noble goal, even if it is slow, is bound to be successful."

Simple and logical, it should also remind people to be angry.

Li Yun's words made Shen Mengyao look at the portrait on the wall and suddenly stunned.

Albert Einstein is the professor's most admired scientist, and it's not surprising that there is a portrait of him here.

"There seems to be something wrong, that sentence doesn't make sense!"

Suddenly, Shen Mengyao stood up, walked to the front of the portrait, and looked at the line carefully.

As for Tang Yi and Li Yun, they can be said to be laymen, and they don't know this scientist.

"It should be, with the support of a lofty goal, work non-stop, even if it is slow, it will definitely be successful, how did this support become support, this is obviously a sick sentence, the teacher didn't find out."

Shen Mengyao naturally knows the professor's idol very well.

How could such an obvious sick sentence appear here?

"Yes, not up, but down, this is a hint, do you remember, I also mentioned it when I lived underground a few days ago, in fact, under the bustling traffic of Mexico City, there are many large bomb shelters, you say, will there be one down there!"

An inspiration jumped out, and Tang Yi stood up directly happily.

The intricate passages of the underground were used to prevent air raids during World War II.

And although this neighborhood is not connected to that side, it will certainly not be without this kind of large-scale underground work.

Coupled with this obvious sick sentence, isn't this just a reminder that the entrance is not above, but below.

"Yes, it's very likely!"

Li Yun patted his head, but Tang Yi turned fast.

As for Shen Mengyao, I also very much agree with Tang Yi's analysis.

So the three of them hurriedly searched on the ground, and after searching all corners, Shen Mengyao suddenly found that a floor was alive.

"Dididi!"

When Shen Mengyao's palm was on the floor, it turned out to be a recognizer.

With a dripping sound, the ground suddenly collapsed, and a black hole appeared in front of the three of them.