Senior Crown Prosecutor Janet King (Marta Dusseldorp) returns from maternity leave determined to prove she still has her edge. But Janet finds a very different Department of Public Prosecutions. The Attorney General has insisted on a closer working relationship with police and Chief Superintendent Jack Rizzoli (Vince Colosimo) has taken an unnerving interest in prosecutions, while ambitious newcomer Owen Mitchell (Damian Walshe-Howling) isn't afraid to bend rules to score a conviction.

When Janet's first seemingly straightforward case escalates into a shocking murder, she is propelled into a complex web of corruption and conspiracy that shakes the police, judiciary and government to the core. With the institutions of justice compromised, prosecuting the murder becomes a dangerous battle of strategy and betrayal which will threaten Janet's career, family and ultimately her life.