When ex-copper Terry Coats was discovered in bed with an air hostess, his excuse that he was 'going undercover' cut no ice with the force - or his wife. But now he's been brutally killed on Hogmanay night, it seems there may have been more to his plea. Dragged from the celebrations, Special Constable Sir Bob Skinner is shocked to find Coats' body alongside that of Griff Montell: his erstwhile protege, and former lover of Skinner's own daughter, Alex. Could there be some dark truth under Coats' story, after all? As the secrets start unravelling, Skinner realises he has gravely underestimated someone close to him - and the effects will cost him, and those he loves, dear?