Dr. Watson confronts Prime Minister Cranfield with evidence of a decades-long crime, unraveling interconnected mysteries involving a murderer, a strange worm, a sinister society called "The Lighthouse," and a secret that could cripple the Empire. The series culminates in a final confrontation on the eve of war.

On the eve of war, Sherlock Holmes and Dr. Watson face a decades-old conspiracy involving a corrupt politician and a secret that could cripple the Empire. This is the thrilling endgame.