Chen Miaomiao, who has just taken over her father's property management group, faces tens of thousands of complaints. Instead of listening to reports, she changes into maintenance clothes and goes undercover alone to Mianjing Lane, the place with the most complaints. As soon as she enters the residential compound, however, she is mistaken for an ordinary maintenance worker and is bullied everywhere. Oddly enough, the other person keeps claiming to be a member of the Chen family, but talks about things that she, the true Chen family member, has never heard of. To get to the truth, she decides not to reveal her identity first—this undercover trip is far more complicated than she thought.