When the body of an inmate is found during a riot in a open prison, Eve and the team are called to investigate to discover the cause of her death. While a strike on the head with a pool cue during the riot appears to have only been superficial, whoever cut her throat had stronger intentions of harming her. With one of the suspects, Tess Williams, stuck on the roof of the prison, Hale must try and extract as much information from Nicole, a fellow inmate. However, a discovery regarding the girl's death leads to a much more complicated investigation for Hale to undertake.