The world almost ended after the Inversion by the Demon Lord Luce, but thanks to the Celestials—people who awakened abilities—the Inversion was stopped, and Luce and his army of demons were defeated. However, the rift between Earth and Hollow Earth that Luce opened brought the arrival of beasts from other realms, and dungeons started materializing on Earth without warning. Beasts took residence on Earth, destroying cities and turning them into their own territories. But with the help of Hunters—people that hunt and capture beasts—humanity had a fighting chance to survive and live with what remains of Earth.

Earth was attacked from beneath its own surface — from a hidden realm known as Hollow Earth. From that darkness emerged demons, led by Luce, the Demon King — a being of terrifying power and ruthless ambition. Humanity stood on the brink of extinction. But in its darkest hour, something extraordinary happened. Humans began to awaken strange abilities — powers that defied nature itself. These gifted individuals rose against Luce and his demonic army, challenging the very force that threatened to erase mankind. After a brutal war, Luce was defeated. Yet his death did not end the chaos. Demons continued to roam the Earth, spreading destruction across continents. In response, humanity united to build a massive fortress — a symbol of survival and resistance. The awakened ability users shared their knowledge, training others and forming organized forces to hunt down the remaining demons. Eventually, the demon race was wiped out. Peace returned. But peace did not mean safety. The balance of the world had already been broken. Rifts began to tear open between Earth and Hollow Earth, allowing monstrous beasts to cross into the human world. These creatures were not demons — they were ancient beings native to the depths below. However, their invasion brought an unexpected opportunity. Each beast possessed a crystal-like core known as a Soul Crystal — the condensed essence of its life force. When extracted after death, these crystals could be refined into powerful energy sources. They revolutionized human technology, providing electricity and fueling rapid advancements that reshaped civilization. To secure this new resource and protect humanity, elite ability users formed an organization known as Hunters — warriors strong enough to fight the beasts and venture into Hollow Earth itself. Using Soul Crystals, the great fortress was reinforced and expanded. Lost territories were reclaimed. Humanity began to thrive once more. But survival always comes at a cost. Sil was nine years old when he lost his parents during one of the early beast incursions. Alone in a broken world, he learned to survive by himself. Years passed, and hardship hardened him. Now seventeen, Sil has made a decision. He will take the Hunter’s Test. Not for glory. Not for revenge. But to survive.