Song Zhiyi, a bank teller, stops an 800,000-yuan pension transfer to a so-called safe account while helping an elderly man who lives alone make a transaction. The old man publicly accuses her of meddling, his family resents her for standing in the way of their money, and the fraud gang films videos to smear her and anonymously sends threatening letters. Everyone advises her that it's better not to get involved in other people's business, but she spots a flaw on a returned receipt and quietly reports it to the police. As she traces the money trail further, what she discovers sends a chill down her spine—the familiar face turns out to be standing right in the bank lobby, smiling at her.