Gu Chengyuan's factory retires an old pot used for boiling medicinal substances and arranges for workers to send it to a specialized disposal facility. He repeatedly warns his neighbors that the pot is highly toxic and must never be used. Zhao Guifang, however, assumes he simply cannot bear to part with a pot and secretly takes it home to use, triggering a serious poisoning incident. Afterward, Zhao Guifang flatly denies stealing the pot, twists the facts, shifts all responsibility onto Gu Chengyuan, and even gathers relatives and friends to demand compensation. Faced with relentless pressure, Gu Chengyuan collects eyewitness accounts, surveillance footage, and warnings posted in the residents' group chat. As crucial evidence emerges one piece at a time, Zhao Guifang's lies are exposed layer by layer, revealing the greed and scheming behind the tragedy.