During a coworkers' dinner, Tang Tang unexpectedly discovers that a colleague has a bank card bearing exactly the same card number as hers. Sensing something is wrong, she checks her account statements and discovers that someone has been using her account to move funds without her knowledge, while a large security deposit has mysteriously been linked to it. She preserves all kinds of evidence, avoids the other party's threats and traps, and joins forces with a lawyer and the police to investigate further. Together, they uncover the truth: the company colluded with insiders to steal numerous employees' personal information, open accounts in their names, and conduct financial transactions. Many victims come forward with evidence, and those responsible are brought to justice. Tang Tang protects her rights, obtains a new bank card of her own, and returns to a peaceful life.