Su Xiaoman's husband, Zhao Dazhu, spends two hours every night lingering in the pigpen under the pretext of tending to the livestock. Wang Yan, a veterinarian and close friend, visits to examine the animals, but her expression changes drastically after checking the pigpen. She urgently warns Su Xiaoman before tragically meeting with an accident at an abandoned brick kiln. Full of suspicion, Su Xiaoman launches an investigation and discovers a hidden cellar beneath the pigpen, unearthing Chunlan, an old acquaintance whom Zhao Dazhu has hidden for years. As clues continuously emerge, Su Xiaoman senses that her husband harbors malicious intent to harm her, while also unearthing hidden secrets behind her father's early death. Secretly preserving evidence and cooperating with public security officers through numerous perils, Su Xiaoman sees Zhao Dazhu's full extent of wicked deeds exposed and punished by the law.