Maisie Hitchins, the pluckiest little detective in Victorian London, idolises the famous detective, Gilbert Carrington, and follows his every case.

But Maisie is about to be given the opportunity of a lifetime: her own mystery to solve!

In the first book in this new series, Maisie rescues a puppy in peril whilst running an errand, and adopts him.

She decides to investigate the puppy's original cruel owner, but instead gets tangled up in an intriguing plot involving stolen sausages, pilfered halfpennies and a fast-paced bicycle chase.