The floor of the entire room gave a slight tremor, followed by the rumble of machinery beneath them.
Song Ning lowered her head and exchanged a glance with Gu Zheng, barely able to contain the delight in her eyes.
Gu Zheng's gaze immediately sharpened as he switched back into combat mode.
He tightened his hold on Song Ning. "Hold on tight! Stay alert!"
Song Ning hooked one arm around Gu Zheng's neck and drew the Boning Knife with her other hand.
"Let me borrow that!"
Gu Zheng freed one hand and took her knife, carving several large marks into the wall, presumably to signal anyone who came after them.
As he returned the knife to Song Ning, he added a warning:
"This knife is pretty sharp. Be careful."
About fifteen seconds later, the entire floor began to descend.
Like an elevator without walls, it dropped a little over ten meters before stopping.
Directly in front of them stood another door, in the same position as the one in the room above.
Gu Zheng gently set Song Ning down, and they exchanged a glance.
Drawing his pistol from behind his waist, Gu Zheng took the lead and crept toward the door.
Once outside, they discovered that the layout below resembled the one above, except that there were more rooms.
A few scattered lights were still on.
At first glance, everything was quiet, as though there was still no one around.
Could those people have somewhere else to retreat to?
Song Ning followed him out of the room and immediately noticed another room at this end of the corridor.
There had only been seven rooms upstairs.
The corridor had ended at the seventh room.
But beside this room was an additional "eighth room" that hadn't existed upstairs.
Just then, she heard the