The Dancing Men

Mr. Hilton Cubbit married a young American girl, named Elsie, a few years ago. Elsie had warned her husband of her dark past and she begged him not dig deeper and ask questions. He managed to keep his promise till the day they received several drawings of little dancing men. Cubbit thought that they were simply some joke, but when he showed them to Elsie, she almost lost her mind. Mr. Hilton could not contact the police, so his only option was to reach out to Holmes.
Will Holmes decipher the message in time to save the married couple? What did the dancing men mean? Find the answers in "The Dancing Men" which is a part of "The Return of Sherlock Holmes".