In 1897 New York City, Lucy and Louise Bullard are trying their best to live a quiet life, untouched by the legacy of their father Adam Worth, an internationally infamous conman and art thief whose exploits inspired the character of Moriarty in the Sherlock Holmes stories. However, upon discovering that their father has a third daughter, kept in the care of their aunt, and that the aunt in question has just been falsely accused of an elaborate crime, the girls cannot help but be drawn into the mystery. Add in their nosy landlady, her snarky, sneaky daughter, and the local chapter of the Sherlock Holmes Appreciation Society, and it’s a recipe for problems, plots, and escapades more convoluted than anything Arthur Conan Doyle...or Adam Worth himself...could conjure!