For the sake of his younger sister, Shen Dongmei, Shen Mobai gives everything he has, even sacrificing 326 days of staying up late and working overtime to buy a fully paid-off apartment. However, at the Civil Affairs Bureau, his sister joins forces with her fiancé, Li Haoyu, to blackmail him into handing over the property, using her unborn child as leverage and threatening to withhold their marriage unless he signs the property transfer agreement. Faced with their parasitic greed, Shen Mobai finally turns against them. Unwilling to give up, the Li family sets up a trap banquet and even attempts to force him into submission through a honey trap. But Shen Mobai carefully plans his every move, secretly hiding recording devices and cameras to collect irrefutable evidence and bring every villain to justice.