Supergrass Trevor Haken risks everything to gather evidence against his mates. Chook Fowler takes bizarre steps to avoid testifying on police corruption. Kim Hollingsworth's police career is jeopardised when she agrees to go undercover for the Royal Commission.

Corrupt cop Dennis Kelly betrays his best mate to the Royal Commission, with tragic results. Gerry Lloyd makes a deadly deal with drug boss Shaka to expose corruption on the Golden Mile. Kim risks her life by going undercover for the Royal Commission. When the operation ends, she receives a shocking reward.

Danny "DK" Karam recruits his own private army to terrorise the Golden Mile. Ruthless newcomer Doc Kanaan stages a bloody coup to seize control of the drug trade from DK. With the corrupt cops banished from the Golden Mile, gang violence spirals out of control.

In the explosive final episode, Doc Kanaan plots to kill John Ibrahim and gain control of the Golden Mile. Joe Dooley and Strike Force Lancer smash DK's Boys and restore order to Kings Cross. Dennis Kelly hires a hitman to clean up his dirty past, as he lobbies for the job of Police Commissioner. Kim risks her life to avenge her unfair dismissal from the police force.