Chris Kollias, the man Frank suspects of knowing more about his brother's death than he's saying, goes missing. It seems Frank will be forced to give up trying to find out what really happened the night his brother was forced over The Gap.

Detectives discover two people who died of carbon monoxide poisoning, they suspect a connection to the activities of Asian gangs. Frank and Rachel gets help from an Asian crime specialist from Task Force Oak. Rachel and Knocker announce their engagement.

Attending a bushfire at a coastal national park, the Nemesis crew notice bloodied tracks in the sand and find a man digging a body in a shallow grave. Harrison is called in to negotiate with a potential suicide.

Frank and Brady investigates Harrison. Brady believes Harrison has something to do with the death of Kevin Holloway.

When Megan, an anonymous witness to Kevin's death is killed, Brady and Holloway search for other people who may have seen what happened.

Meanwhile, Goldie and Knocker investigate a murder in a park. The Nemesis crew have to supervise a photo shoot for a world-famous model

Knocker is finally caught in his own deadly web. Frank informs Goldie of Knocker's involvement in Kevin's death but she refuses to believe him until Brady shows her the evidence.