Earth's magnetic poles disappeared and mankind was nearly wiped out by cosmic radiation. Within the span of a hundred years, living creatures began to mutate and devour each other while the remaining humans, numbering in the tens of thousands, struggled bitterly in their man-made bases. Humans had to live in fear and live under strict rules.

A group of armed humans accidentally arrived in the Aura Abyss, where they camped in a safe place while they battled mutant animals.

"I'm so fed up with this life..." Leo, a member of the armed group, said with a frown. That female member Angela patted Leo's shoulder and comforted him. "Hey..our food supplies are gone for at least a week..we need to get out of this abyss quickly and return to the bases within a week..don't let any of you get hurt by the genetically modified creatures." Zane, the leader of this group said. The group's vice leader, Ethan, nodded his head in support, and its member Peter, female member Alexa, and male Xiao were checking their cartridges.