A distraught young woman arrives at Baker Street urgently requesting the assistance of Mr Sherlock Holmes. But the great man and his assistant Dr Watson are away. What to do? She confides in Holmes's landlady, Mrs Hudson, who over the years has developed certain powers of deduction from observing her tenant at work. The young woman, responding to this, begs her for help. Reluctantly, Mrs Hudson agrees...
Thus begins a series of adventures, recounted engagingly by Mrs Hudson herself. Adventures and investigations which take her across the country, from the Midlands to Sydenham, from Eastbourne to Edinburgh. Her warmth and down-to-earth practicality are brought to bear on a range of strange and startling crimes that occasionally lead even Mrs Hudson herself into mortal danger.