London, late-1800s. Sherlock Holmes is a consulting detective, using his powers of observation and deduction and vast knowledge on anything relevant to solve mysteries, including crimes. Cases that would stump most other detectives are short work for him. He is ably assisted by his friend Dr Watson
Sherlock Holmes finds himself evenly matched when he is employed by the King of Bohemia to retrieve an indiscreet photograph from the American actress and singer, Irene Adler.
A gentleman is baffled when the childish drawings of little dancing men terrify his American wife. Sherlock Holmes soon discovers why.
An unknown thief steals an important naval treaty from a Foreign Office clerk; Sherlock Holmes sets out to find it.
A strange man on a bicycle follows a young music teacher as she bicycles on a lonely road to and from the city.
Col. Barclay is found dead and his wife is arrested for the murder, but Holmes is convinced a missing door key will reveal the true killer.
A young woman asks for Holmes' help when her ill-tempered stepfather moves her into the same room where her sister died under mysterious circumstances.
When the Countess of Morcar's priceless blue carbuncle is stolen, a reformed thief is charged with the crime.