In London, circa 1897, a young mouse named Olivia Flaversham is celebrating her birthday with her toymaker father, Hiram. Suddenly, Fidget, a bat with a peg leg, barges in, and after a brief struggle, disappears with Hiram. Fidget takes Hiram to Professor Ratigan who commands him to create a clockwork robot which mimics the Queen of the Mice so Ratigan can rule England. Hiram initially refuses to participate in the scheme, but agrees when Ratigan threatens Olivia.
Sherlock Holmes enquête sur une affaire de chantage, mêlant le prince héritier de Bohême, une princesse scandinave et une talentueuse chanteuse d'opéra...
Sherlock Holmes is a fictional character created by Dr. John Watson (Ben Kingsley) as the central character in a series of short stories published in Strand Magazine. Watson uses the character to enable him to solve crimes incognito, so as not to disrupt his career as a doctor during a period when he was applying for a post at an exclusive hospital, one in which the senior staff would frown on Watson's "hobby". Although he does not secure the job, Watson decides to satisfy public demand to see Holmes in person by hiring unemployed actor Reginald Kincaid (Michael Caine) to play the part of the fictional detective.