The brutal slaying of a respectable middle aged Vietnamese couple in Cabramatta is carried out amidst the stress of the Internal Affairs investigation. This time it's Malik in the hot seat. Whatever he says to I.A. will affect Crowley's future. Meantime, Malik and Koa try to work out who killed Mr and Mrs Ngo. Mrs Ngo was a difficult wilful woman who liked everything her way. Mr Ngo was a community minded man. Was the killer their own son? He stands to inherit the family wealth. The press reveal that several years back Mr Ngo was a witness of a gangland murder by the notorious Black Dragon street gang. Is this connected?

In the midst of investigating the murder of a Serbian car salesman, Malik's obsession with the past deepens. Malik seeks to prove that John Hunt was once an armed robber, and the man who shot his father. But this is contrary to the evidence. Is Malik going mad? Can he find the evidence that will prove Hunt's guilt? And why is Crowley obstructing him? Is it sheer bloody mindedness or is there a reason? Malik, Koa and all at Major Crime, work to solve the mystery behind the Serbian killing. The detectives discover that the car salesman is not as respectable as he appeared. Has his dark past something to do with this death?