The first time subhumans came into human consciousness was seven years ago.

The first to discover this species was the Rufus Volcano Expedition funded by the Carmer Consortium, a group of thirteen people from various European countries, all experienced experts and expedition members, led by Claude Duval, the eldest son of Chairman Leon Duval and the future heir of the Carmer Foundation.

More than a decade of elite education has cultivated energy and curiosity, and as a veteran explorer and climber, Claude is fully capable of taking on the role of team leader, which he is proud of. He was reluctant to live in the shadow of his father, although in the end he had to accept the fact and try to become like Leon Duval.

The expedition team went deep into the ground from the crater, traced the source along the icy dark river, surveyed the terrain and landforms in the cave thousands of meters deep, looking for signs of life, and obtained a large amount of first-hand information for 20 days.

As the expedition drew to a close, the expedition unexpectedly discovered a new creature. They resemble humans in appearance, with pale skin, near-zero vision, hearing and smell to perceive the world, powerful limbs, able to hang upside down on rocks like bats, and crawling at speeds close to those of an adult.

Claude called them subhumans.

Out of a high sense of superiority over humans, they agreed that the subhumans were a group of apes that had gone astray in the process of evolution, belonging to a simple-minded lower species, and living by preying on giant salamanders in the dark river.

Due to the shortage of materials and the conditions for further investigation, the expedition team decided to capture a subhuman and bring it back to the surface for research. They set a trap by the river and lured the subhumans with food to throw themselves into the net, but to everyone's surprise, the subhumans discreetly sabotaged the trap and disappeared into the darkness with the food and nylon nets.

The team was both surprised and excited by the discovery.

Claude didn't think so, he felt a strong crisis, and immediately exercised the authority of the leader, leading the expedition to evacuate the subhuman-infested cave and head to the surface as fast as possible. The rest of the group disputed his decision, believing that he had missed a golden opportunity, to which Claude replied, "The subhumans are smarter than we think, and I'd rather stay away from them until I'm ready." ”

He subconsciously referred to the subhumans as "they" instead of "them", fully expressing the uneasiness in his heart.

The development of events proved that Claude's judgment was completely correct. On the way back to the surface, the expedition was attacked by subhumans one after another, three members of the expedition were missing, two were wounded, and they were forced to abandon their cumbersome equipment and flee to Base 1 in Rufus Crater.

The subhumans didn't catch up, and they seemed to have an instinctive fear of sunlight, reminiscent of the legendary vampires, who could only roam in the dark and the sunlight would scorch them to ashes.

For a variety of reasons, the Carmer consortium kept the existence of the subhumans secret. Three months later, Claude Duvall led a second heavily armed expedition deep into the ground and launched a sneak attack on a group of subhumans who were hunting by the river, killing three on the spot and successfully capturing a female.

The specimen was housed on the fifteenth basement floor of the Carmer Institute, where an elite team led by Claude observed the study day and night, like a guinea pig for an experiment.

However, just a few days later, an accident struck, when a terrifying moni (a monster bred by subhumans, known for its ferocity) broke into the underground research chamber and wreaked havoc, killing all the researchers. Claude was also tragically killed in the catastrophe, and although no body was found, surviving surveillance footage showed him being taken in the mouth by Monimon and disappearing into an unfathomable burrow.

The loss of a son in middle age was an incomparably heavy blow, and the angry Leon Duvall invested a lot of financial and material resources to hire elites to form a third expedition, intending to avenge his son in the name of investigation.

In the dark, damp underground caverns, the mercenaries used light weapons and incendiary grenades to kill more than a dozen unarmed subhumans. The subhumans immediately retaliated, driving Monimon to hunt the mercenaries in a frenzy, a brutal and efficient killing machine with so much force that bullets could not penetrate their scales and incendiary grenades, and the end result was that the expedition was wiped out, leaving no one spared.

And just like that, you go back and forth, friction escalates, and when the subterranean caverns that subterranean lives on are completely destroyed, they become angry, and Monimon begins to attack the human city, turning the reinforced concrete forest into ruins. This is how the Asiatic War broke out, and in the end the whole of Europe was involved, and many countries suffered huge losses.

If accountability must be pursued, the culprit can only be attributed to Leon Duval, but looking back, what did Leon do wrong?