The boundary between life and death has vanished. Across a world plunged into absolute chaos, the deceased no longer rest; they rise as hollow, aimless wanderers, pushing humanity to the edge of extinction. As the dream of immortality turns into a living nightmare, survivors flee the mounting ruin in a desperate bid for safety.

However, Pyo Guwon moves against the tide. On his journey through the wasteland, he discovers Heo Jinwoo, a man abandoned and left for dead following a brutal attack. Rather than leaving him to the shadows, Pyo offers Jinwoo a hand and a haunting question: “How does it feel to survive hell?” This meeting marks the beginning of a grim partnership as Pyo leads Jinwoo to a mysterious sanctuary where death has lost its significance. But in a reality that refuses to bury the past, they soon learn that surviving the end of the world is only the beginning of their struggle.