Security guard Xu Dazhuang's nightly patrol takes a dramatic turn when he catches his lifelong rival, Jiang Gui, having an affair in the apartment garage. Seizing the moment, he secretly films the betrayal and sends the proof directly to the man's wife, Jiang Rong—a woman of renowned beauty whom Xu has admired from afar. What begins as an act of petty revenge quickly spirals into a dangerous obsession. As he uses the video as leverage to insert himself into Jiang Rong's vulnerable life, their forced proximity ignites a mutual, illicit attraction, blurring the lines between blackmail, revenge, and a desperate chance at a love he never thought he could have.
