A man consults Holmes about a series of dancing men picture-messages his terrified wife is receiving.

Holmes is approached by a young Foreign Office employee to recover a stolen document before it can cause an international scandal and ruin his career.

A woman consults Holmes because she is being followed by a man on a bicycle.

After a fierce marital argument, a man is found dead next to his unconscious wife in a locked room with no key and with curious animal tracks outside the window.

Holmes is approached by a woman who feels threatened after hearing a whistle she first heard on the night of her sister's death.

A man is charged with stealing a famous jewel, the Blue Carbuncle. He denies the theft, but all the evidence is against him.