Probationary employee Jiang Ning is asked by colleague Li Wei to cover her National Day shift, while supervisor Zhou Ting applies pressure regarding her regular employment status. Jiang Ning refuses, strictly executes the work schedule, and keeps evidence such as chats and emails. Li Wei unauthorizedly snatches her project proposal signature, goes traveling, causes the project to be shelved, and leads the client to terminate cooperation. When the company holds people accountable, Jiang Ning submits original records proving she only completed approved work. Investigation uncovers Li Wei and Zhou Ting's credit-snatching, rule-violating reimbursements, and black-box appraisals, and the two face disciplinary action. Thanks to her rigor and professionalism, Jiang Ning gets promoted, wins back the client, promotes transparency in shift-swapping, signatures, and bonuses, and builds a fairer team order through rules and evidence.