Xu Zhiwei is a down-to-earth woman who runs a garment factory. During a routine banking transaction, she unexpectedly discovers a discrepancy in the amount of cash she receives. She is not alone: several other customers, including Sun Guizhi, encounter similar problems. Refusing to remain silent, Xu Zhiwei and her partner, Sister He, carefully gather evidence, while young bank teller Chen Lu holds crucial information. Facing deputy branch manager Liang Guodong, teller Zheng Xiaoli, and others, Xu Zhiwei remains calm and rational, cooperating with the audit department to investigate the matter and gradually uncover the truth, determined to protect ordinary people's legitimate rights and interests.