Before dawn on a misty November morning in 1536, prominent mercer Robert Packington was gunned down as he crossed Cheapside on his way to early morning mass. It was the first assassination by handgun in the history of the capital and subsequently shook the city to its core. Thomas Treviot is a young London goldsmith and a close family friend of Robert Packington. Through his own upstanding social connections - and some less upstanding acquaintances he has made along the way - Thomas launches a dramatic investigation into Packington's death. As Thomas searches for revenge, he must travel from the golden heart of merchant London, to the straw-covered backstreets of London's poorest districts before reaching the country's seat of power: the court of King Henry VIII.