The acclaimed BBC drama series returns with more tension, heartache, friendship and betrayal. Glamorous gangster's wife Francesca is back. Finding herself at the centre of a gangland turf war, she takes an unknown step into the criminal underworld. Meanwhile, long suffering prisoner's mother Harriet is hoping for a second chance in love, but she couldn't have chosen a more complicated suitor in the Prison Chaplain. Joining them are Kim and Aisling. Aisling is the honest, dynamic daughter of a repeat offender, whilst Kim is new to this world. Her loving husband is accused of a heinous crime and Kim vows to clear his name. But as she adjusts to life as a prisoner's wife, secrets she'd rather forget, come back to haunt her.