Han Qing is a female police officer and part of the Criminal Investigation Team. She is a hard-working woman who only cares about her work. She has had a good working relationship with her partner, Zhong Wei, for many years. However, two months ago, Zhong Wei disappeared after following a suspect. Han Qing has ever since been looking for any clues as to what has happened to him. During the investigation of a new case, Han Qing stumbles upon a connection to Zhong Wei's disappearance and gets pulled into a network of organized crime.