Noh Eun-Ha, known as the , has returned from the brink of death in the Black Dungeon's deepest floor, which humanity deemed impossible to clear. In his past life, he both lived to die and lived because he couldn't die. His family was lost, his heart closed off, and he burned with hatred towards monsters, with a death wish close at hand.

Despite a desperate desire to live and find a purpose, he feared looking back on his life of killing to fill his empty heart. However, this new life will be different, as he'll do anything to find happiness, even if it means killing and surviving at all costs. He'll walk a solitary, treacherous path, and demand respect from all, regardless of their power, wealth, or strength. Without fail, his ultimate goal in life is to find happiness and he'll stop at nothing to achieve it.