Sherlock Holmes and Dr. Watson receive a visit from an elderly lady demanding help for a seemingly small problem. Holmes is intrigued by her case because he senses some greater evil lies beneath. Together the two travel to the small hamlet of Firwick where Holmes hopes to unravel a tangled mystery. This is a novel length story typical of the Holmes tales. The Sherlock Holmes Uncovered Tales are a series of original stories based upon the immortal characters, Sherlock Holmes and Dr. Watson, created by Sir Arthur Conan Doyle. The Poison Pen is the 11th story in the series.