Millie Bobby Brown has made quite the career out of Netflix. She popped onto the scene as one of the stars of the hit series Stranger Things and now she’s set to make another big splash in Enola Holmes, an upcoming film for the streamer in which she plays the precocious little sister of Sherlock Holmes, the world’s greatest detective.

There’s not much to be gleaned from the teaser, but we do know that the new mystery film will also star Henry Cavill as Sherlock and Sam Claflin as Mycroft Holmes. Enola Holmes is set to drop on Netflix on September 23rd.