Rebellion is in the air of London in the spring of 1663. Thomas Chaloner spy for the King's intelligence service has just returned from thwarting a planned revolt in Dublin but soon realises that England's capital is no haven of peace. He is ordered to investigate the shooting of a beggar during a royal procession. He soon learns the man is no vagrant but someone with links to the powerful Company of Barber-Surgeons. He master the Earl of Clarendon is locked in a deadly feud with the Earl of Bristol & an innocent man is about to be hanged in Newgate. Chaloner is embroiled in a desperate race against time to protect Clarendon to discover the true identity of the beggar's murderer & to save a blameless man from the executioner's noose.