When Enola Holmes (Sherlock's sister) discovers that her mother has gone missing on her sixteenth birthday, she endeavors to find her, becoming a super-sleuth in her own right as she outwits her famous brother.
When her mother's trail leads her into London, she ends up on a thrilling adventure. Pairing up with a runaway lord, she attempts to solve a mystery by unraveling a conspiracy that threatens the entire country.