The body of a Melbourne woman is found mutilated at Sydney Harbor, taking detectives Frank Holloway and Rachel Goldstein to Melbourne to investigate. The womans sister and a shady King Street nightclub owner seems to know more than they are letting on. A man pulled from the sea by the Nemesis crew claims his boat was struck by a cargo ship, sending him and his still missing wife overboard.

The investigation into the death of Melissa Davies continues, but the stakes are raised with the knowledge that her son, Jordan, is still alive.The question is why would these men want the child? Fearing that Jordan may have witnessed her mothers murder, the detectives are desperate to find him before he is killed. An eager young journalist following the Nemesis crew is more interested in Tayler than his story, but Sykes s overly co-operative in what he tells the reporter about his colleagues.

The investigation into the suicide of a young man reveals a greater tragedy, a secret that will ultimately destroy the lives of all those involved.

When a man is taken by a shark in the harbour, the water police uncover a complex web of embezzlement, a faked death, underworld connections and a bizarre betrayal.

What starts as another ordinary day at the office ends in the death of a Goldie a much loved rat.

Jack is forced into a deal with undercover cops when Detective Alex St Clare joins the rats and there is a conflict of interest in a murder investigation.

Jack fights to save the life of an undercover cop, Alex St Clare whom he suspects is emotionally involved with her target.

The series resumes on a spectacular note with a helicopter crashing into an overcrowded pleasure boat. The fatality list is long but two survivors are trapped on the sinking craft unable to be moved. Meanwhile, on shore, Mary Coustas (without the Effie frightwig) is a troubled survivor and knows more than she is saying. There is a scramble for clues as the detectives Jack Christey and Alex St Clare track down the cause of the chopper's crash and ponder why the pilot has a bullet wound in his neck. It's a good yarn and the drama, as Tommy Tavita and his mates work to save the trapped souls, is tense.

A torched yacht, two bodies, two men missing. Who is dead, who is alive and who did it?