After descending to the underground level, Julien discovered that this was indeed a miniature prison. There was a long corridor in front of him, and on either side of the corridor were rooms sealed off by reinforced concrete walls on iron railings.

Each room had no walls facing the corridor but iron railings that allowed you to see everything inside at a glance. Even the simple toilet inside had only a one-meter-high wall, and people's heads were exposed when using the toilet.

Even though it was completely underground, the air, temperature, and humidity inside were no different from those above. Charlie thought there would be a strange smell when he came down, but he was surprised that he didn't feel any discomfort at all.

Albert came to him and said, "Mr. Wade, we installed a fresh air system when we built this place. The air in here is circulated twice an hour. It even includes a central dehumidification system, so it doesn't feel humid even underground. I also installed centra