Synopsis: Five years after giving up his life of crime in the London sewers, Montmorency is back. But his evil alter ego, Scarper, has returned too, pulling him back into a dark world of crime. Montmorency's old friend and fellow government agent, Lord George Fox-Selwyn, fights to rescue him from disaster. The two men are needed now more than ever, as a rash of bombings threaten to destroy England's rail lines. And only Montmorency's intimate knowledge of…