Retired professor Zhang Jianguo has been a widower for many years, raising his daughter Zhang Rui alone, exhausting his savings to buy her a house, and even using his pension to support her family. Yet for six consecutive years, his daughter used drawing lots as an excuse to spend the holidays with her in-laws, leaving him alone in an empty house. It wasn't until a hundred lots all reading "in-laws' home" accidentally scattered that he saw the truth. Heartbroken, he decisively cut off financial support, blocked his daughter, and began his own retirement life. Unexpectedly, his daughter teamed up with her husband to livestream slander, attempting to force him to hand over money. Driven past his limit, Zhang Jianguo brought out a ten-year ledger, joined forces with a lawyer for a desperate counterattack, and brought the truth to light!