the legendary detective has taken the law into his own hands, it might be the last. What drove a good man to cross the line? Or have times changed, and the rules with them? Detective Inspector Siobhan Clarke faces Edinburgh's most explosive case in years, as a corrupt cop goes missing after claiming to harbour secrets that could sink the city's police force. But in this investigation, it seems all roads lead to Rebus - and Clarke's twin loyalties to the public and the police will be tested to their limit. A reckoning is coming - and John Rebus may be hearing the call for last orders ...