As detectives arrive on the wing to investigate a murder, the case quickly becomes national news. The police are under pressure to make an arrest and, in their eyes, everyone's a suspect... Life on C Wing has been forever altered: the ripple effect of the murder touches officers and prisoners alike, and the atmosphere is paranoid and tense. But no one feels the heat quite as much as Leigh: she's suffocated by the guilt of the murder happening on her watch, and becomes more isolated than ever when she realises that, in her colleagues' eyes, she has blood on her hands.

Leigh reaches breaking point when she learns that she may have played a more direct role in the murder than even she knew... But, unbeknown to Leigh, Rose has her own share of blame to shoulder. As the police home in on a suspect, can Leigh and Rose save themselves and deliver justice?