Her codename is [Su Jin], and she is a "contracted scavenger" who wanders in a world on the verge of collapse. Branded on the soul, the shackles are invisible. She serves the underlying law of the universe - the "Balance Agreement of the Law of Causality", using absolute rationality as the blade to obliterate the sources of distortion: immortal madmen, out-of-control AI, luck-devouring emperors... Everything can be quantified, and all living beings are variables. Emotion is redundant, empathy is poison, and only efficiency and correction points are her cold currency leading to "liberation". Walking in ashes, the price is like a shadow. "Law analysis" provides insight into the cause and effect of all things, and "entropy reduction control" reverses the moment of life and death. Every time a task is completed, it is another burning of the soul. Mental wear and tear follows him like a shadow, and unfamiliar memory fragments scream under the frozen heart lake - it is the back of a crying girl, her bloody past that was erased by the agreement. The noise is low and the mark is imprinted. The dying curse of the wasteland warriors, the embedding of the dynasty's resentful crystals, the silent roar of mutated destiny... The "impurities" of the mission world are polluting her inhuman perfection. When abnormal codes flashed in the settlement information flow, and when the mystery of the "key stone" pointed to the dark truth hidden deep in the agreement, the cold logical core of Sujin produced a crack called "doubt" for the first time. Pay off debt or fall into the abyss? When the Scavenger itself becomes an "abnormality" that the system needs to clear away, who will she swing her blade at? To the cold agreement that controls all living beings? To the sad existence that has been rewritten? Or...