1915. The great detective Sherlock Holmes is retired & quietly engaged in the study of honey bees when a young woman literally stumbles into him on the Sussex Downs. Fifteen years old gawky egotistical & recently orphaned the young Mary Russell displays an intellect to impress even Sherlock Holmes
- & match him wit for wit. Under his reluctant tutelage this very modern twentieth-century woman proves a deft protegee & a fitting partner for the Victorian detective. In their first case together they must track down a kidnapped American senators daughter & confront a truly cunning adversary
- a bomber who has set trip-wires for the sleuths & who will stop at nothing to end their partnership.