They say it takes a thief to catch a thief, and the glamorous field agents of VSS put this to the test when they allow their newest member, the American sneak-thief Scarlet, to take point on her first mission: hoping to derail an imminent coronation, an unknown scoundrel has stolen the Crown Jewels from the Tower of London. It's up to Lark, Raven, Brooke, and Scarlet to steal back these vibrant symbols of the monarchy they have been paid to protect.