I should start by noting that I've never read any of the books depicting Sherlock Holmes's younger sister. In fact, I've never read any of Arthur Conan Doyle's original novels. Coming into "Enola Holmes" completely unaware of its background, I was pleased. The point is to be entertaining, and the movie is just that. In a role quite different from Eleven on "Stranger Things", Millie Bobby Brown plays Enola as a vivacious girl out to challenge the Victorian era's gender norms while solving a mystery. It's nothing spectacular, but will be enjoyable if you have nothing else to watch.