The North East, 1970. On the brink of retirement, DCI Gently and his team investigate a body found in a chemical waste tank. When Gently discovers the victim's wife was convicted of the murder eight years ago, he decides to re-open the case - a controversial move. But DI Bacchus opposes Gently's decision, not least because he worked as a DS on the original investigation - putting mentor and protégé at complete odds. Is Gently about to expose an appalling miscarriage of justice, or will he sacrifice his reputation and legacy for a convicted murderer? And can Rachel help heal the widening rift between her superiors, whilst navigating being a woman in a professional male world? Finally, will the team finally prove beyond doubt the identity of the killer? (thetvdb.com)