While on the run from her brother Sherlock, the world's most famous detective, Enola Holmes has been hiding in plain sight, lodging with Mrs Tupper. Mrs Tupper may be half-deaf and a terrible cook, but she is the closest thing Enola has to a family. So when she discovers that her dear land lady has been abducted, Enola is shocked but determined to find out why. Especially when she finds cryptic codes within a crinoline underskirt in Mrs Tupper's upturned room... But who could have taken Mrs Tupper? And why do all the clues lead to Florence Nightingale?

It's another gripping case for our young heroine in this enthralling fifth mystery.