The story follows an intermittent, comprehensive investigation launched in Division Two of Dahua Company's Northern Region after an anonymous tip-off letter arrives. Zhou Yuzhi, a newcomer to the disciplinary inspection team at Dahua's headquarters, steps forward despite the obstacles posed by officials protecting one another. She investigates the truth thoroughly, ultimately catching the company's parasites and protecting the anonymous whistleblower from harm. As the investigation delves deeper, she also forms a strong bond with Yan Yu, a rookie in Division Two.
