Bea Smith is locked up while awaiting trial for the attempted murder of her husband and must learn how life works in prison.
Cast: Kate Atkinson, Celia Ireland, Robbie Magasiva, Katrina Milosevic, Shareena Clanton, Jacqueline Brennan, Nicole da Silva, Pamela Rabe, Danielle Cormack, Socratis Otto, Aaron Jeffery, Ra Chapman, Katherine Grinlaw, Tammy Macintosh, Libby Tanner, Kate Jenkinson, Sally-Anne Upton
Bea scrambles to get a step ahead of Ferguson, who's scheming as the trial approaches. Maxine continues chemotherapy. Liz believes Sonia is innocent.
Kaz forms an alliance with Tina's crew to take Bea down, but their plans change when Bea finds out that has Jake smuggled more drugs into the prison on Tina's behalf.
Bea learns Allie has relapsed back into drug addiction and removes her from Kaz's control. Also: Franky pursues Shayne in order to expose Ferguson's plan to sabotage her trial.
Bea has trouble recovering after her attack. Ferguson returns from hospital and is immediately placed under supervision in a medical hold.
A clandestine affair heats up, but neither party knows their every move is being watched. Maxine undergoes a procedure away from the prison.
Bea holds a vote among the inmates to determine if there should be a top dog in the prison. Ferguson finds out that there is a surprise witness for Jesper.
Lucy confronts Bea after she is released from the slot; Liz has a chance for immediate release; and Doreen turns her back on Bea.
With Bea in the slot, Ferguson seeks to strengthen her hold over Kaz by manipulating acting top dog, Maxine into an act of extreme violence. Bea & Ally bond while in neighbouring slots.
Ferguson has protection from Kaz's crew; Bea begins to lose the support of the women when she defends Will; Maxine is diagnosed with breast cancer.
Against Vera wishes, Ferguson is released into general population. The women are out for blood but Vera confines Ferguson to her cell for safety reasons. As always, Ferguson has an end game but will she live to accomplish it?
Vera attempts to have Bridget fired; Ferguson tries to be released into the general population.
Joan Ferguson steps back into Wentworth prison, but this time as a prisoner. Kaz Proctor, a woman Bea used as an informant in the previous season, and her crew (The Red Right Hand) have also been imprisoned.