While in prison and preparing for parole after serving time for the murders of his mother and father-in-law, Mark met young probation officer Gemma. After his release, they develop a relationship and move in together. Although Mark feels that he is in control, Gemma is not as na ve as he imagines; she's from a wealthy family and isn't committed to a lifetime career in the probation service. She begins to see him as a means to help her gain some revenge...