Meet Gethin Grey, crusading hero with problems of his own. His Last Resort Legals team investigates miscarriages of justice in and around Cardiff; on the side he gambles and struggles with a creaking marriage.Izma M. was sent down for the brutal murder of Hannah Gold. In jail, he penned an acclaimed autobiography and attracted supporters convinced of his innocence; the charismatic Amelia Laverne among them.Gethin is less convinced but he needs the money so when Amelia offers to fund an investigation to prove Izma's innocence, he takes on the case.The stakes prove chillingly higher than Gethin ever imagined and Amelia shows herself to be a force ofnature, both mesmerising and destructive.