Emma Banville, a human rights lawyer known for taking up lost causes, sets out to prove the innocence of Kevin Russell. Convicted of the murder of schoolgirl Linda Simms 14 years earlier, Kevin maintains his innocence throughout his time in prison. As she digs deeper to uncover the truth, Emma goes to extreme lengths and discovers that powerful forces within the police and intelligence community will stop at nothing to prevent her from revealing the true cause of Linda's death.