My sister-in-law, Wang Li, treats her younger brother-in-law Xu Jianguo's convenience store as a free warehouse. For a long time, she has been taking milk, snacks, and daily necessities without paying, accumulating a total bill of over 3,000 yuan. Not only does she take advantage of the situation herself, but she also encourages her son to open packages and take merchandise at will. She even gives away goods from the store to win people's favor. One day, she pays just 2.5 yuan but tries to walk away with more than 200 yuan worth of goods, only to be caught red-handed by Xu Jianguo. Faced with Wang Li throwing a tantrum and his older brother trying to smooth things over, Xu Jianguo produces complete evidence and firmly demands that the outstanding debt be paid in full. He stands his ground and protects his little shop, making his opportunistic relatives suffer the consequences of their own actions.