This week, Mo Murray (Anne-Marie Duff) has taken a stand against drugs, gangs and gun crime in her community. It is the funeral of a local gang member and the gang's leader Cormack (Joe Dempsie) has sent a message to all the local shops: stay closed and show respect, or there will be consequences. But hairdressing salon owner Mo (Anne-Marie Duff) refuses to be intimidated. Supported by her best friend Sue (Olivia Colman), they take a defiant stand and open up for business. Retribution follows when a youngster is shot and killed, and matters escalate until members of the Murray family find themselves in the dock.