Murder usually follows its own unique, twisted logic. Deputy Chief Constable Bob Skinner has a failed marriage and a death on his conscience. However, he faces the biggest challenge of his career within the secret corridors where dark power is wielded. As his hunt develops, he goes to the top - the Prime Minister - lest he himself becomes collateral damage. Meanwhile, in Edinburgh, Skinner's daughter is being stalked. Can he protect her? A bookmaker taking one gamble too many has paid his debt in a gruesome fashion. Is it an underworld vendetta, or something more sinister? Then, Skinner believes he's discovered a bigamist at work - or is it something worse? Four crimes, four crises: can Skinner and his people solve them? Indeed, can they survive them?