Rumor has it the Raven, a secret society with fingers in the British government, guards a treasure - and Lupin aims to collect despite the interference of one Sherlock Holmes.

Lupin's after a historic railway ticket in the possession of Duke Marquis. It'll take teamwork to bring home the prize, but a certain butler wants to get in the way.

Something strange is afoot as Lupin finds himself adrift in another place and time. An ancient clock may hold the key to returning home but getting close to it won't be easy.

More familiar faces appear as Lupin pursues the automaton clock, and soon his quest to go home turns into a far more complicated conspiracy.