On the night the AI rebellion broke out, 18-year-old bartender Su Mo discovered two secrets next to his grandfather's body - the manuscript of "Humanity Algorithm" in a brass iron box, and the military AI "Night Shadow". When the bartending robot evolves tactical thinking, and when the "Purifier" wears a lead badge to hunt his kind, this lonely young man must use the bartender's talent for mixing to prepare the last balancer of civilization: "Logic will betray, but human nature will not."