In 1525, artist Susanna Horenbout is sent from Belgium to be Henry VIII's personal illuminator. After an attempt is made on Susanna's life, John Parker, the king's most lethal courtier, is charged with keeping her safe. Further attacks are made and Susanna and Parker realize that she unknowningly carries the key to a plot against the throne. With a gang of urchins, their wits and instincts, the two work through the layers of deceit at the court of the king.