"Damn it!" Ning Yu cursed under his breath, while fending off the experimental subjects' attacks and calling out to the system in his mind: "System, is there any way to deal with these experimental subjects?"

However, the system did not respond at all, as if it had fallen into a deep sleep.

"System? System!" Ning Yu's heart sank. He knew that at the most critical moment, the system had failed him again.

"Ning Yu, watch out!" Mu Xue's voice rang out. Ning Yu turned around and saw an experimental subject attacking him from behind. In the nick of time, Ning Yu's body reacted instinctively; he lunged forward, narrowly avoiding the attack.

The test subject's sharp claws swept across his head, creating a gust of wind, and a few strands of hair fell down. Ning Yu felt a wave of fear wash over him; if he had reacted even a fraction slower, he would already be disemboweled.

"We have to find a way to get out of here!" Mu Xue shouted as she fired her gun.

However, the cave has only one exit, which is now blocked by experimental subjects who have come after hearing the commotion, leaving them in a desperate situation...

“Wait a minute,” Ning Yu suddenly noticed that a metal plate behind the test subject seemed to be loose. “Perhaps…” He didn’t finish his sentence, but instead threw the weapon in his hand at the metal plate.

With a loud "bang!", the metal plate was smashed, leaving a dent and revealing the dark space behind it.

"What is this?" Mu Xue asked in a low voice while keeping a wary eye on the experimental subject.

Ning Yu did not answer. He quickly stepped forward and carefully observed the space behind the metal plate in the dim light.

"This is... an entrance!" Ning Yu exclaimed in surprise, discovering that an underground passage was hidden behind the metal plate. "Quick, let's go through here!"

With that, he forcefully pushed aside the metal plate and crawled inside first. Mu Xue followed closely behind, and the two quickly moved through the narrow passage, with the angry roars of the experimental subjects behind them.

After running for an unknown amount of time, the view suddenly opened up before them. They had arrived at a spacious underground space, brightly lit and with fresh air, a stark contrast to the dilapidated world outside.

"Where...where is this?" Mu Xue looked around in surprise. She saw that the underground space was neatly filled with a large amount of supplies, including food, water, medicine, tools, and weapons.

"If I'm not mistaken, this should be a pre-war supply depot." Ning Yu's eyes gleamed with excitement. "It seems even the heavens are on our side!"

This unexpected discovery undoubtedly gave Ning Yu and his team a huge boost. The aftermath of the war was devastating, and supplies were scarce. Now, they had found a perfectly intact supply depot, which was incredibly good news for their upcoming reconstruction efforts.

"That's great! With these supplies, we can..." Mu Xue said excitedly, but before she could finish speaking, Ning Yu grabbed her arm.

"Be careful!" Ning Yu's expression changed. Just now, he had keenly sensed a dangerous aura.

Almost simultaneously, with a soft "hum," several red laser beams shot out from the ground beneath their feet, forming an impenetrable laser net that trapped them within...