Senior Prosecutor Janet King returns from maternity leave to confront a high-profile murder, and a conspiracy which will have shocking ramifications throughout the judicial system.

Janet is overwhelmed with guilt about Blakely's death, and Det. Campbell believes his demise could have something to do with an old case; Erin and Owen are preoccupied with a bikie murder.

In the wake of the drive-by shooting of murder witness Zebina Petrakis, Erin finds herself emerging as a key witness herself in the case against the two bikies who committed the murder.

When Janet's father becomes the NCC's main suspect, she's torn between compromising the entire investigation & the need to pursue the truth. But as evidence against him grows, is a daughter's heart overruling a lawyer's head?

The search for the third man who assisted in the Blakely murder uncovers an unlikely ally for Janet and the scent of high level corruption.

After the death of a young cricketer caught up in a betting scandal, Janet takes a job for the National Crime Commission investigating the dark world of organised crime and its links to match fixing and performance enhancing drugs.

Janet’s estranged father suddenly re-enters her life suspected of fixing matches for the Northern Devils - a club already under intense scrutiny after their star player punches one of his teammates, resulting in his death.

If they find the drug responsible for Tyler's death, Nate will get off his manslaughter charge, but Maxine wants him to keep his mouth shut about the betting syndicate. The trial is fast approaching.

Janet helps homeless teen Pearl which leads her to the drug that contributed to Pearl's brother's death, uncovering a doping & betting scandal with sports agent Maxine Reynolds as key suspect.

As the NCC closes in on the man who forced Clay to kill himself, Janet discovers who is behind the betting syndicate, placing both herself and her father in danger.

Heading up a Royal Commission into gun crime, Janet King believes solving the murder of Todd Wilson will uncover what's fuelling the violence.

After the drive-by shooting at the Nobakht's, the Royal Commission focuses on the origin of George Healy's gun and the 322,000 Todd left behind - leading to a dead body and a link to a murder.

After discovering the gun used in the drive-by was used in Ash's killing and the kneecapping of gambling addict Felix Murphy, the Commission launches an undercover operation to find out who shot Felix.

The suspicion on Karen is quickly transferred to Major Simon Hamilton and continues to mount due to his missing Ferrari, abusive reputation, no alibi for the night of Todd's murder and a shipping container full of handguns.

Janet is in a race against time to bring mastermind Darren Faulkes to justice. But the unexpected intervention of an old foe is about to derail Janet's entire investigation.

Janet faces humiliation when Dianne Vasilich appeals against her conviction for murder. Her pursuit of corruption uncovers a shocking secret and sees Janet facing her greatest threat.

Blakely's killer is finally revealed, but Janet discovers there's someone higher up pulling the strings - someone powerful and very close

With increasing political pressure for the Royal Commission to deliver results, and the container full of handguns so far yielding nothing, Janet is forced to fast-track the undercover mission.

Following Brett Bonar's death, the Commission discovers he was not only the shooter at the Nobakht house and involved George Healy's killing, but he also knew Ash's killer. So who is he working for?

Janet discovers Darren Faulkes is the mastermind of the betting syndicate, but with no evidence, the NCC is forced to launch an undercover mission using a most unlikely operative.

After the attempted murder of her family, Janet suspects that she has stumbled onto a wide-ranging conspiracy involving powerful and well-connected paedophiles, including Judge Renmark.

A sudden death, a false suspect and a shocking revelation from the witness box all conspire to block Janet's desperate search for the truth.

Despite solving Todd Wilson's murder, the political pressure on Janet culminates in a dilemma: she must either step down or suspend the Royal Commission.

With her Royal Commission suspended, Janet has to fight off the State Corruption watchdog, her political enemies, and ultimately, Ash's killer.