In the thrilling conclusion to the Enola Holmes series, Enola is on a mission to find the missing Lady Blanchefleur. Meanwhile, her brother Sherlock Holmes is hot on her trail with a message from their long-lost mother—a message that only Enola can decipher.

Sherlock and Mycroft follow Enola into the dark underbelly of London to solve a triple mystery. Where is their mother? What happened to Lady Blanchefleur? And what connects them all?