James is in custody and the police remain convinced that James is guilty, but Ruth has doubts that draw her to Elizabeth Marshall's hospital bedside.

With Ian dead, Ruth is removed from duty on the murder squad and placed back on the beat, where she finally has to confront the possibility that she will never find Cal's killer.

In the final episode Ruth is caught between loyalty to the Traveller community and exposing who she believes is the killer. Will she do the right thing?