London, 1679. A year has passed since the sensational attempt to murder King Charles II, but London is still a viper’s nest of rumored Catholic conspiracies, and of plots against them in turn. When Harry Hunt --- estranged from his mentor, Robert Hooke --- is summoned to the remote and windswept marshes of Norfolk, he is at first relieved to get away from the place. But in Norfolk, he finds that some Royal workers shoring up a riverbank have made a grim discovery --- the skeleton of a dwarf. Harry is able to confirm that the skeleton is that of Captain Jeffrey Hudson, a prominent member of the court once famously given to the Queen in a pie. Except no one knew Hudson was dead, because another man had been impersonating him.