Prison officer Leigh lives for her job at Long Marsh men's prison. But when mouthy young Rose arrives, fresh out of training, C Wing will never be the same again.
As the pressure on her rises, how far will Leigh go to save her job? Rose starts to find her feet in a terrifying new world.
Will Leigh cross the line between officer and criminal? Rose carries out a dangerous mission, and finds herself trapped in a potentially deadly double bind.
Leigh becomes increasingly isolated from her sceptical colleagues. A guilt-ridden Rose takes a chance to make amends. Toby's suspicions lead him to his own investigations.
With C Wing on lockdown, the prisoners' mental health reaches crisis point in an under-resourced and chaotic system. Meanwhile, Rose sees an opportunity, and Toby threatens to escalate his suspicions.
As Long Marsh comes under the spotlight, life on the tense and paranoid C Wing is altered forever - and everyone is a suspect.
Leigh learns of a dangerous rumour that there's an undercover cop on C Wing. But weeding out the officer is far from easy.
Leigh doubts her team's loyalties when she discovers the identity of the undercover cop. Rose worries about a new arrival: a double murderer.
Rose is faced with a terrifying decision. C Wing is plunged into chaos when the inmates go on strike. And Leigh confronts the corrupt officer on her team.
The deadly threat posed to Rose by Reeks forces Morgan to take matters into his own hands. Meanwhile, Rose tries to get close to a prisoner.
The truth finally comes out about Katy Trent's killer - and it's far more shocking than anyone could have imagined...
In a thrilling finale, a hostage situation develops on C Wing. Can Leigh and Rose save themselves and the future of the prison?
