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
The lives of officers and prisoners remain in the balance as the prison is still under hostage. Who lives and who dies. Will the prison ever be the same again?
Liz makes a desperate attempt to see her son, whilst Jake becomes concerned for Linda when she's still being manipulated by Sean. The women turn on Marie, as Marie prepares to make a bold plan to be exonerated for her crimes.
The officers and prisoners find out what really happened to Ruby, as Marie's fall from grace continues her protector wants her silenced for good. Sean manipulates Linda into keeping quiet, and Liz meets her son for the first time in years.
Ruby fights for her life as Marie continues to manipulate Will. The Prisoners are on edge as things are on the edge of imploding, the officers struggle to maintain the peace.
The Prisoners tensions are still extremely high as questions start to be answered about what happened. While Boomer has some long awaited catching up to do.
The Prisoners and Staff mourn the loss of their Top Dog, while the hunt is on for the person who murdered her. Tensions remain very high as the investigation into the death stir up emotions for everyone.
Vera learns the sex of her baby whilst Marie and Kaz try and make amends, with Rita facing an impossible dilemma to keep her identity as a former cop a secret after being told to kill Kaz by the new inmate.
Kaz is sent to isolation for everyone else's safety, while a new prisoner arrives and is a blast from Rita's past, as the prison spirals out of control, Will refuses to speak with Kaz, she later talks with Dr. Miller and Allie cuts off all ties with her. Linda officially begins her new role as deputy governor, as a new officer from Walford has the prisoners talking.
Rita and Kaz form an alliance to bring down Marie, whilst Jake's jealously toward Vera is apparent as she forms a bond with a new colleague. Whilst a new acting deputy is voted in, it's someone we would least expect it to be.
The prison is on tenterhooks as the war between Marie and Rita goes over the edge, after Rita has spent a very long time in isolation, she's out for revenge and so is Marie.