As Bob Skinner's biggest investigation develops, he goes to the very top - the Prime Minister - lest he himself becomes collateral damage. Meanwhile, back in Edinburgh, Skinner's daughter is being harassed by a stalker. Can he protect her? A bookmaker has taken one gamble too many and paid his debt in a gruesome fashion. Is it an underworld vendetta, or something more sinister? Alongside it all, a casual call to the Chief Constable sets him on a personal crusade which quickly points to a bigamist at work. Or is it worse? Four crimes, four crises: can Skinner and his people solve them? Indeed, can they survive them?