Mycology researcher Lin Mo brings back a specimen box containing highly toxic destroying angel mushrooms from the Qinling Mountains, which is accidentally lost when placed in the car trunk. He immediately uses a loudspeaker to broadcast warnings in the residential compound. Through property surveillance checks, the box is found to have been casually stolen by Auntie Sun from the 6th floor, who loves taking small advantages. Lin Mo teams up with property management to visit her home and dissuade her, informing her that the mushrooms are extremely toxic and have no antidote. However, Auntie Sun superstitiously believes that eating mushrooms with garlic can detoxify them, and out of excessive pride, she refuses to admit fault, firmly believing nothing will happen to her, and publicly declares she will bear the consequences herself. Late at night, old Ma's poison acts up, and everyone hurriedly calls an ambulance, but the golden rescue time has long been missed. Auntie Sun's greed for minor gains, stubborn adherence to incorrect common sense, and obsession with saving face ultimately lead to a tragedy.