Netflix has released the official trailer for Enola Holmes, starring Millie Bobby Brown as the teen sister of Sherlock (Henry Cavill) and Mycroft (Sam Claflin) Holmes. After seeing a thoroughly enticing teaser released a few weeks ago, eager fans can now get a better sense of what awaits them with this new Enola Holmes trailer.

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Image via Netflix

Talk about a rousing trailer! The latest look at Enola Holmes introduces us to Victorian teen Enola Holmes (Brown), raised to be just as whipsmart and inventive as her older brother, Sherlock, by her mother (Helena Bonham Carter). Enola's world is turned upside down when her mother goes missing on the morning of her 16th birthday. Determined to figure out where her mother went and prove her brothers wrong by solving the mystery on her own, Enola heads out into the wide world looking for answers. And if you think this is going to just be some standard-issue, Sherlock Holmes-esque adventure, you've got another thing coming.

Joining Brown, Cavill, and Claflin in the Enola Holmes cast is Louis Partridge, Fiona Shaw, Adeel Akhtar, Susan Wokoma, and Frances de la Tour. Enola Holmes is directed by Harry Bradbeer (Fleabag). The Legendary feature, adapted by Jack Thorne (Harry Potter and the Cursed Child) from the Nancy Springer novel of the same name, was acquired by Netflix earlier this year.

Enola Holmes will be released on September 23. You can watch the official trailer below. For more, find out what's coming to Netflix in September.

And here's the official synopsis for Enola Holmes:

England, 1884 – a world on the brink of change. On the morning of her 16th birthday, Enola Holmes (Millie Bobby Brown) wakes to find that her mother (Helena Bonham Carter) has disappeared, leaving behind an odd assortment of gifts but no apparent clue as to where she’s gone or why. After a free-spirited childhood, Enola suddenly finds herself under the care of her brothers Sherlock (Henry Cavill) and Mycroft (Sam Claflin), both set on sending her away to a finishing school for “proper” young ladies. Refusing to follow their wishes, Enola escapes to search for her mother in London. But when her journey finds her entangled in a mystery surrounding a young runaway Lord (Louis Partridge), Enola becomes a super-sleuth in her own right, outwitting her famous brother as she unravels a conspiracy that threatens to set back the course of history. Based on the beloved book series by Nancy Springer, Enola Holmes is a dynamic new mystery-adventure that introduces the world’s greatest detective to his fiercest competition yet: his teenage sister. The game is afoot.

Allie Gemmill is the Weekend Contributing Editor for Collider. You can follow them on Twitter @_matineeidle.