One of the better (and longer) in the series featuring Mr. Holmes and his faithful sidekick, Dr. Watson.
Holmes is asked to investigate the circumstances behind a young woman's new position as governess, in that she's asked to some 'odd things' as part of her job. No, it doesn't involve sex, but it does involved wearing certain clothes, behaving in certain ways; as well, it pays about four times what the average governess would have earned at the time.
Now, I figured this one out early, but it took away none of the enjoyment of this story. Holmes is in his best form, Dr. Watson is eagerly at this side, and the young woman in question - named Violet, and one of four Violets which feature in the Holmes series - was well-portrayed. Sir Arthur didn't skimp on details, neither did he write her as clinging, weak-minded, or in need of 'male rescue.' In fact, all she wanted was help in figuring out the situation she found herself in.
And she got it.
Great Holmes story.