1585, London.
"Queen Elizabeth is gravely ill and her spymaster, Francis Walsingham, has received intelligence that there is a plot to assassinate her.
He sends his protégé Kit Scarlett and Scottish agent Iomhar Blackwood to gather information.
To their horror, they discover there is a plot to blow up Hampton Court Palace.
With Queen Elizabeth too unwell to be moved from the palace, it is imperative the plot is foiled as quickly as possible."