Enola Holmes, the much younger and more tempestuous sister of Sherlock, returns with the adventure of the young daughter of a baronet, Lady Cecily Alistair, who is trying to escape her father's sinister plans. Twice in the past, Enola has saved Lady Cecily from the unpleasant plans of her father, Baronet Sir Eustace Alistair. And when Enola is unceremoniously thrown out from the doorstep of the Alistair residence, she soon realizes that Lady Cecily needs her help again. Making a daring escape, Enola leads the lady to her secret office, where she is quickly found by the person Lady Cecily's mother hired to find the missing girl – none other than Sherlock Holmes himself. However, the girl has already disappeared again, and is now roaming alone in the dangerous neighborhoods of London. Enola must find Lady Cecily once more before Sherlock manages to locate her and return her to her father. Once again, the game begins for the young detective…