A notorious jewel thief known as the Phantom Thief Kid has set his sights on a newly-discovered Fabergé Egg and challenged authorities to stop him with a cryptic warning. When Richard Moore is called in to help with the case, Conan and Rachel do, of course, tag along, as does Harley Hartwell. Things become complicated, however, when a notorious assassin shows up who also has an interest in the egg and his sights set on the Kid. As the mystery of the Last Wizard of the Century unravels, links to important events and personages in Russian history become more evident, as does the unique nature of this particular egg. What is the ultimate mystery that the Egg hides, who are the Kid and the Scorpion, why does Officer Santos suddenly seem to know who Conan really is, and will Conan finally reveal the truth of his identity to the increasingly suspicious Rachel?
