Steel Steam and Flame

　　The time when the Black Fort was built is inconsistent with that of Brino. It is a landmark building built after Brino's rise. The underground waterway below has a brand new taste. There is not much rain here, and the pasted concrete above the head looks no different from the freshly dried concrete block.

The beam of the bright flashlight hits one side of the waterway, where the concrete color is a little lighter than the surrounding color, and it was put up later. The difference in contrast is very obvious, showing the shape of a gap, which is another waterway line that was re-blocked later.

Cassia tied the bright flashlight to her waist and took out the small shovel prepared in advance, and confirmed that in this long waterway, apart from herself and the running mouse, there were no other people. Later, only then began to tap small grooves along the shape of the gap.

This was to put those small pits used for timed blasting bombs. After discussing with Linna in the morning, Cassia decided to choose what he was most familiar with and good at as a breakthrough for this mission. Their current plan only lacks the necessary chaos. In order to ensure that the action at the party can proceed smoothly, Cassia still feels that they have to add something to them. Putting all the possibilities on others, he and Linna both felt uneasy.

So after the negotiation was completed, they went out of the small hotel to the trading building, bought a detailed drawing of the underground waterway map of Brino, and rushed to the Black Fort. There was still plenty of time. And this waterway, which was forced to abandon due to consideration of the complete problem of the Black Fort, was discovered on the way there.

The Black Fort is the largest and most luxurious hotel in Brino. The people they receive are either the small heads of a party or the big money owners who came here from the gray area or from the empire. At the beginning, the designer intended to connect the underground waterway directly under the black castle to facilitate the discharge of domestic wastewater every day. However, considering that such a big safety hazard is buried underneath, anyone can get in through the waterway, so I changed the design and designed the waterway of the Black Fort into a semi-independent state, with only one interface to the urban waterway network system, and The security level was also sent to guard. It is almost impossible to break through without being discovered.

And this abandoned line was only half repaired. According to Cassia's estimation, it might only reach the periphery of the Black Fort Hotel, not close to the core area.

But this was enough. Cassia just wanted to use the sound of explosives and local vibrations to create chaos, or to create opportunities for those people who were opposed to the Imperial Mineral Company and the Three Primary Colors Group. He never thought about sinking the entire Black Fort. He might have this idea in his mind, but the amount of explosives he bought in the trading building was not enough.

Linna is responsible for exploring the different places on the panoramic map, observing the number of security personnel around the black fort and the station, roughly judging its strength, and choosing the most suitable route to escape at night.

The pit was dug soon, and Cassia adjusted dozens of timed blasting bombs to the same time, all of which were stuffed into the groove.

Hidden not far away, he checked his watch, the hour hand pointed at half past one.

"The square above should be very lively." The last note of exclamation hadn't spread far out of the waterway, and dozens of directional blasting bombs on the side rang out on time. The muffled sound was continuously compressed in a narrow area. As it increased, Cassia felt that there was a layer of misty air in her ears, and the sound became quieter.

The square above the waterway was already occupied by a lively crowd. Brino was built on a gentle slope. The structure of the underground waterway is stair-like, and it is very deep from the ground. The faint movement below is completely buried in the noise of the noise, without even a person's attention.

The fat rats did not lose their flexibility and flew in the waterways, far away from the explosion site.

When the light struck again, all the rats squatting there ran away. The small pieces of concrete spattered by the blast, fell on a pile of mold-covered bones on the ground. Cassia stood there and waited for a while. There was an exit from a waterway not far away. He saw that there was no movement coming from there, so he was relieved that it did not attract people's attention and walked over.

A lot of concrete is used for sealing, and there is a layer of sintered hard red brick inside, and its overall thickness is about one meter. After so many years, even the mouse has never drilled a hole here. However, the explosive bombs made by Rox are designed to make holes in the base protective wall, and there is no problem with this wall.

A large circular building block has completely fallen off the wall and is very heavy. Cassia pushed it in so hard to give him a gap through which to enter.

"Boom"

The rock-like building block fell into it, and the agitated dust brought the air inside and rolled back towards Cassia's face. He quickly took a step back, the afterglow of the bright light illuminating his surprised face.

In the forever closed abandoned route, what should exist is endless and deep darkness, and the air with a scent of decay. They will be like no longer running on the train tracks, they will be covered with rust in the endless cycle of four seasons~www.ltnovel.com~ until they are washed and mixed into the soil by rain. But in the air coming from the pavement, there was nothing left except the smell of dust that remained unchanged for years.

There is no darkness, no smell of decay. On the contrary, there is even a little water vapor.

A hundred meters away, Cassia's eyes caught a faint light. I also felt the air in my face.

Entering inside, the ground is considered dry, and the scenery under the light is also an ordinary underground waterway scenery, nothing special. The end was not a piece of unexcavated soil. There, Cassia saw several thick copper pipes, which were ten times larger than the usual steam supply pipes. The faint light came from under the pipes.

"Shouldn't the steam pipes and power pipes supplying the city of Brino be buried in a shallower layer?" Cassia's heart beat, with a faint guess, he speeded up and walked over.

The pipes are far more than the ones he saw in front of him. Behind these thick pipes, there are more densely arranged pipes extending into the darkness. There are dozens of them, and under the light of the flashlight, there are different numbers on them.

Looking down, Cassia finally saw the source of the faint light captured when he pushed the building block away not long ago.

Because he had heard what Linna said in the morning, what he was faintly guessing at the moment was not wrong. The ground under the black fort has long been hollowed out, which is very simple for the Imperial Mineral Company. Then they built a smuggling transaction center here. (To be continued.) 8