Mark Cobden is sent to prison and has to learn quickly how to survive. When an inmate identifies prison officer Eric McNally's weakness, he faces an impossible choice.
Series 1
Mark Cobden is newly imprisoned, consumed by guilt for his crime, and way out of his depth in the volatile world of prison life. He meets Eric McNally, an excellent prison officer doing his best to protect those in his charge. However, when one of the most dangerous inmates identifies his weakness, Eric faces an impossible choice between his principles and his family.
Series 2
Orla, a single mother serving her first sentence, Abi, who is incarcerated for life, and Kelsey, a pregnant heroin addict and repeat offender, begin their respective sentences at a women's prison.