In the thick of a career-defining case, Roz is under intense pressure to prove herself to her superiors. But when she faces conflict with a colleague, it's not long before AC-12 decide to probe her handling of the investigation.

"On the way to get an informant to arrest a major suspect in a murder case, Chief Inspector Joanne Davidson noticed the abnormal situation and temporarily decided to lead the team to divert to deal with an ongoing armed robbery case, thus delaying the best way to arrest the suspect. Is this a pure coincidence or a premeditated design? After understanding the relevant situation, the anti-corruption team AC-12 decided to intervene in the investigation"...

Detective Chief Inspector Tony Gates is an exemplary cop. He's got the best crime stats on the force and a loyal team working under him. But the head of the police anticorruption unit, Superintendent Ted Hastings, has his doubts about Gates. Is he really that good? And more importantly, is he really that clean? Hastings decides to find out and calls on a new arrival to his department, Detective Sergeant Steven Arnott to help him do it. As the net...