My Friend the Detective (1924)

You can't necessarily use literature to solve a murder. That’s what the avid reader of detective novels, Astrid, will realise when she tries to imitate her novel heroes in a creepy murder mystery. Although her skills as a private detective fall short, she still learns a lot from her attempts. Such as that a charming policeman can be as good as any Sherlock Holmes, both in crime and in love. (Stumfilm.dk)