"This is so creepy! Could Moss be on the other side of the wall?" he asked Ariana.

Ariana and Adrian both imagined Moss Lurking nearby. Adrian attempted to calm his nerves but in vain. He frantically wiped his hands, then his neck, and finally his legs, as if trying to scrub away his fear.

Meanwhile, Ariana considered the situation. "I doubt it's Moss. He's not the type to play games like this. It's probably someone else trapped like us," she said.

As if realizing something, Ariana and Adrian exchanged a glance.

In the next room.

Holden stood before the wall, tracing the engraved patterns with his fingers. Confused, he turned to Bennett. "Is there someone next door? Could Moss have imprisoned someone else here?"

“That's impossible. The fourth basement level only consists of rooms for resting. It's not meant for locking people up," Bennett said, shaking his head.

Despite brushing off Holden's concern, Bennett was lost in thought, frowning.

It was exceptionally odd. Typically, only he and the late Rohan would visit this metal house. How could there possibly be someone else here?

Moreover, Moss was notoriously secretive and cautious. Whom else could he possibly trust?

As Bennett pondered, his thoughts raced through known associates, searching for any link to Moss.

Meanwhile, Holden attempted to talk to the unseen neighbor through the wall. After receiving no reply, he tapped the surface again and listened intently. The person on the other side also tapped on the wall in response.

It appeared the wall was soundproof.

Considering Bennett's insights and the sounds from the wall, Holden decided to go out to investigate further, hoping to uncover useful clues.

Bennett joined him.

But to their astonishment, there was no room next to theirs, just a corridor.

Standing in the center of the broad corridor, the chill of the air struck Holden and Bennett. Sensing something was off, they swiftly returned to the room and tapped the wall once more. The response from the other side was immediate.

Hearing the clear response again left Holden perplexed. He said, “There's definitely someone next door, so why was there no room when we looked?"

He wasn't alone in his confusion. Even Bennett, who was Moss' nephew, was baffled by the situation.

Meanwhile, Adrian and Ariana were convinced that the person next door was trapped by Moss, just Like them.