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.