The Daughter of Sherlock Holmes Mysteries

England, 1914. Joanna Blalock's keen mind and incredible insight lead her to become a highly skilled nurse, one of the few professions that allow her to use her finely tuned brain. But when she and her 10-year-old son witness a man fall to his death, apparently by suicide, they are visited by the elderly Dr. John Watson and his charming, handsome son, Dr. John Watson Jr. Impressed by her forensic skills, they invite her to become the third member of their investigative team.

When an executed original of a secret treaty between England and France, known as the French Treaty, is stolen from the country estate of Lord Halifax, Scotland Yard asks Joanna, Dr. John Watson, Jr., and Dr. John Watson, Sr., to use their detective skills to participate in the hunt for the missing treaty. As the government becomes more restless to find the missing document and traditional investigative means fail to turn up the culprit, Joanna is forced to devise a clever plan to trap the thief and recover the missing treaty. 

Joanna and the Watsons receive an unexpected visitor to 221B Baker Street during a nocturnal storm. A rain-drenched Dr. Alexander Verner has just returned from an unsettling trip to see a patient who he believes is being held against his will. Joanna quickly realizes Verner's patient is a high-ranking Englishman who the Germans have taken captive to pry vital information about England’s military strategies for the Great War. The police are frantic to find him before the Germans can use him to decode all of England’s undeciphered messages.

In the west end of London, an apparently crazed individual is on the loose, breaking into art galleries and private homes to slash valuable paintings of women. Despite Scotland Yard's best efforts, the criminal remains at large and continues on his destructive path. When Joanna and the Watsons are called in to solve the mystery, they soon discover that although the canvases have been slashed, their backings remain pristine, with no cuts or scratches. The criminal, it seems, is no mere vandal - he's searching for something hidden behind the portraits.

Joanna and the Watsons are called in by the Whitechapel Playhouse to find Pretty Penny, a lovely, young actress who has gone missing without reason or notice. While on their search, the trio is asked by Scotland Yard to join in the hunt for a vicious murderer whose method resembles that of Jack the Ripper. It soon becomes clear that the Ripper has reemerged after a 28-year absence and is once again murdering young prostitutes in Whitechapel.

During the height of the Great War, playboy Prince Harry, the third in line to the British throne, vanishes in thin air while horseback riding in Hyde Park The strikingly handsome playboy prince is initially believed to have arranged his disappearance so he can enjoy a brief rendezvous with one of his secret lovers. But when his absence continues on for days, the royal family grows concerned and summons Scotland Yard, who can only recover scant, unrevealing clues.