A deadly secret. An evil plot. And a race against time to save England from disaster. London, 1899—When a mysterious packet is stolen from a diplomatic courier, Sherlock and Lucy are called upon to recover it, before its ominous contents fall into the wrong hands. Their best hopes for success lie with a pretty young bookstore attendant, and her father, the kindly old bookstore owner. As they work to recover the stolen packet, the Baker Street gang uncovers a dark, tangled web of intrigue, and an evil plot that could very well bring all of England to its knees. When a notorious criminal is found dead in the bookstore basement, and the bookseller is arrested for the crime, the danger becomes very real, and very personal. Can Holmes and Lucy find the perilous packet, catch the murderous mastermind, and foil the fiendish plot? Or will the case of the bookseller prove to be the Baker Street team’s final chapter?