The disappearance of Alistair Ainsworth

Summary: Joanna and the Watsons receive an unexpected visitor to 221b Baker Street during a nocturnal storm. A rain-drenched Dr. Alexander Verner arrives with a most harrowing tale. Verner has just returned from an unsettling trip to see a patient who he believes is being held against his will. Joanna quickly realizes that Verner's patient is a high-ranking Englishman who the Germans have taken captive to pry vital information about England<U+2019>s military strategies for the Great War. The man is revealed to be Alistair Ainsworth, a cryptographer involved in the highest level of national security. The police are frantic to find Ainsworth before the Germans can use him to decode all of England<U+2019>s undeciphered messages. Ainsworth must be found at all costs and Joanna and the Watsons might be the only ones who can connect the clues to find him.