Gu Shi looked out and said, "Is that it? This castle looks so huge."

Zhang Nan agreed and said, "Its area is indeed quite large, and the castle's defenses are also very good. It can be said that various magic circles are deployed around it, which shows how much importance the Hamid brothers attach to this place.

If the people who were tracking him hadn't been careful, he would have been caught in the first sight."

"Don't worry about the magic circles. We have alchemical tools that can block them. After testing, we can approach the castle quietly without attracting anyone's attention.

We need to focus on other issues. The castle's main building has three floors, and except for the main gate, all other windows and balconies are sealed. So if we want to get in, we have to deal with the two guards at the gate first."

As he spoke, Zhang Bei handed a telescope to Gu Shi.

Gu Shi took a look through the telescope and found that it was just as Zhang Bei said. All the exposed windows of the castle and the balconies on the second and third floors were sealed tightly. It could be said that not even a fly could fly in.

The castle has two layers of structure. The outermost layer is a circle of defensive walls that encloses a fairly large area of ​​land.

Inside the city wall, in addition to the main building in the middle, the castle also has four towering towers, located in the four corners of the main building, namely the east, south, west and north.

These towers are not of the same height. The two at the back are about two or three stories higher than the front ones, and they occupy a larger area than the front two.

The two towers in front are connected to the castle. The top floor is a completely open balcony. Combined with the outer walls that undulate like gears, they look like two watchtowers.

The two towers at the back are completely independent.

The one on the left is a bell tower, at the top of which you can see a huge exposed bronze bell. The tower on the right is the largest of the four towers, and its purpose cannot be seen from its appearance.

The windows in the four towers were also boarded up.

…

In the following time, Zhang Bei took Gu Shi to go over the plan carefully, especially some of the details. He didn't know how many times he had told Gu Shi about it, which made Gu Shi feel a little bit amused and helpless.

Gu Shi said helplessly, "Captain Zhang, don't worry. I've remembered everything you said."

Zhang Bei also realized that he seemed to be a little too long-winded. He smiled a little embarrassedly and said, "I'm sorry. Although I know that you, Gu Shi, are also an experienced adventurer, but when I saw your face, I subconsciously treated you as one of those newcomers."

Gu Shi shook his head. "It's okay. I know you mean well, Captain Zhang."

At this time, Zhang Nan stepped between the two of them, hugging their necks on the left and right, "Okay, okay, it's almost time now, brother, you should let Gu Shi go back and rest early."

Zhang Bei glanced at the time and said, "Let's stop here for today. Remember to adjust your sleep schedule when you go back today. Our operation tomorrow will be in the evening."

Gu Shi made an OK gesture and said, "Got it."

Time passed quickly, and in the blink of an eye it was dusk the next day.

Gu Shi, Zhang Bei and Zhang Nan were fully armed and quietly lurking around the castle, silently waiting for the opportunity to come.

Feeling a slight vibration from the pocket watch hanging on his chest, Gu Shi knew that it was time to take action.

This pocket watch was given to him by Zhang Bei before the operation began. There are five similar pocket watches in total, which are in the hands of Gu Shi, Zhang Bei, Zhang Nan, Qin Yao and Ji Wen respectively.

The five pocket watches are inductive to each other and can be used not only to transmit information but also to indicate each other's positions.

This is the communicator for their operation this time.

After the signal for action sounded, Zhang Bei and Zhang Nan stepped forward at the same time, one on the left and one on the right, and tacitly dealt with the two guards standing at the door without making any sound.

After entering the outermost gate, the three of them did not communicate with each other, but quickly started searching separately according to the previously arranged plan.

Zhang Bei and Zhang Nan rushed straight to the main building in the middle, while Gu Shi bypassed the main building and headed towards the two towers at the back.

The first thing Gu Shi set his sights on was the clock tower.

There is a small wooden door at the bottom of the clock tower with a very conspicuous brass lock hanging on the door. It looks very sturdy, but in fact it doesn't have much effect.

Gu Shi took out a sharp dagger and easily removed the big lock from the door. Suddenly, a conspicuous big hole appeared on the wooden door.

So you got in so easily? It looks like there's nothing inside this clock tower.

Thinking of this, Gu Shi pushed open the door and walked into the bell tower. Because of the bronze bell, the top of the tower was not completely sealed, and dim light leaked through the gaps between the buildings.

Gu Shi took out a lamp, then went up the spiral staircase and searched the tower from top to bottom as quickly as possible.

Sure enough, just as he thought, there was nothing in this tower with very weak defenses.

After coming out of the clock tower, Gu Shi was about to go to the tower on the other side. Who knew that when he was halfway there, he saw the door of the tower on the other side was slowly opening.

Someone!

Gu Shi quickly stopped, stood where he was, and observed quietly.

Since entering the castle, he has used alchemical items to make himself invisible. Even though there is no place to hide around, he is not panicking.

This tower is different from the bell tower just now. It has a heavy iron door at the bottom. Judging from the traces of use on it and the comparison with the tower's outer wall, it should have been newly installed recently.

After a heavy creaking sound, three men in armor walked out from behind the iron gate. They all wore the same style of long swords at their sides, and they all looked like warriors.

After closing the iron gate, the blond man in the lead pulled out the key and put it in his pocket.

Gu Shi had been thinking about whether he could get some useful information from them, but the three of them were very silent. After coming out of the tower, they followed the established patrol route to the city gate. No one spoke during this time.

After observing for a while, Gu Shi gave up his original idea.

Gu Shi stood diagonally to the side of the three people, and the staff in his hand shook slightly. Three wind blades appeared out of thin air and quickly passed through the three people's unprotected necks, followed by a dull sound of them falling to the ground.

The strength of these three people is not that strong, and they cannot escape Gu Shi’s attack at all.

After confirming that all three were dead, Gu Shi quickly stepped forward and took out a bunch of keys from the blond man. Then he quickly dealt with the scene and restored the surroundings to the appearance that nothing had happened.