The first teaser for Netflix’sEnola Holmeshas now been released and reveals a release date of September 23. The trailer gives us a glimpse at Millie Bobby Brown as the titular character, as well asThe Witcherstar Henry Cavill, who will be portraying the burliest version of Sherlock Holmes ever committed to screen.

Enola Holmesis an adaptation of the mystery-thriller book series of the same name, written by Nancy Springer. The source material on which the movie will be based chronicles the adventures of Sherlock Holmes' younger sister Enola (a creation of Springer’s and not part of the established canon) who, when her mother disappears, decides to become a super-sleuth in her own right. Running away to London where she establishes a clandestine private detective career specializing in missing person investigations, Enola must also keep ahead of her brothers who are determined to capture and force her to conform to their expectations.

The upcoming adaptation has some supremely talented individuals at the helm, with the movie being directed by Harry Bradbeer and written by Jack Thorne. Bradbeer has seen a lot of success recently with the likes of the hit series’FleabagandKilling Eve, whilst Thorne is the writer behind the movieWonderand last year’s adaptation ofHis Dark Materials. Alongside Millie Bobby Brown as the title character,Enola HolmesstarsHenry Cavill, Sam Claflin, Fiona Shaw, Adeel Akhtar, and Frances de la Tour, as well as Helena Bonham Carter as Eudoria Holmes, Enola, Sherlock, and Mycroft’s mother.

“What you’re watching is a young girl trying to find herself in hectic chaos that she doesn’t really know how to handle, but that’s just kind of life in general for a teenage girl,” saysMillie Bobby Brown, who has seen huge success since her standout performance as Eleven in the hugely popularNetflixsci-fi/horror seriesStranger Things. The director behind Enola Holmes has lauded Brown’s “extraordinary level of spontaneity and invention” as well as her bravery, with the actress throwing herself into the physical aspects of the role. “Whether you were dunking her in a bucket of water and trying to drown her or throwing fireworks at her, she was just so up for it”, he said of the 16-year-old star.

Despite the movie not having been released yet,Enola Holmeshas already found herself in trouble, with the estate of Sherlock Holmes author Sir Arthur Conan Doyle currentlysuing Netflix, Legendary, and the author, writer, and director behind the upcoming movie over copyright and trademark issues. Evidently, the issue is Sherlock Holmes being made too friendly, with the suit claiming that, despite most of the originalSherlock Holmesnow being in the public domain, this does not pertain to Doyle’s last 10 stories about the character. The claim is that theEnola Holmesbook series, and therefore the upcoming movie, borrow certain elements from these stories, namely the famously stoic detective’s emotional state.

How the lawsuit shakes out remains to be seen, but audiences can now look forward to seeing the adventures ofEnola Holmeswhen the movie hits the streaming service in September. This comes to us courtesy ofNetflix’s official Twitter account.