After fourteen-year-old Enola Holmes seeks the missing Duquessa Del Campo in the seedy underbelly of nineteenth-century London, she finally reaches an understanding with her brothers Sherlock and Mycroft.

As Enola searches for the missing Lady Blanchefleur del Campo, she discovers that her brother Sherlock is just as diligently searching for Enola herself?and this time he really needs to catch her! He is in possession of a most peculiar package, a message from their long-lost mother that only Enola can decipher. Sherlock, along with their brother Mycroft, must follow Enola into the reeking tunnels of London?s dark underbelly as they solve a triple...

Pursued by her much older brother, famed detective Sherlock Holmes, fourteen-year-old Enola,disguised and using false names, attempts to solve the kidnapping of a baronet's sixteen-year-old daughter in nineteenth-century London.