Former Judge Ginette Prince sent a lot of dangerous people to prison in her time so, when someone sets fire to her home, the police officers wonder if the motive is revenge. However, Ginette's been retired for years and the criminals she put away are no longer a threat, so vengeance seems unlikely.

Ex-lovers Finn and Leila are thrown together again when his daughter Niamh goes missing. Finn is taken aback when Siobhan reveals that Niamh had an older boyfriend back in Belfast – has she gone to see him? The stakes are raised when Callum finds CCTV of Niamh being taken away in a van on the way home from her friend Joanne's house.