Five years after Charles II's triumphant return to London there is growing mistrust of his extravagant court and of corruption among his officials - and when a cart laden with gunpowder explodes outside the General Letter Office, it is immediately clear that such an act is more than an expression of outrage at the inefficiency of the postal service.
As intelligencer to the Lord Chamberlain, Thomas Chaloner cannot understand why a man of known incompetence is put in charge of investigating the attack while he is diverted to make enquiries about the poisoning of birds in the King's aviary...