Trout Tape

One of the best works about Sherlock Holmes, "The Spotted Ribbon" or "The Pied Piper" is a detective story by the English-Scottish writer Arthur Conan-Doyle.
Ellen Stoner turns to Sherlock Holmes for help. She said that a few years ago, just two weeks before her wedding, her sister Julia died under mysterious circumstances. Before her death, Julia only managed to whisper: "Trout ribbon." And now Helen is about to get married, and at night she also hears (like her late sister) a soft whistling. Stoner feels that something strange and terrible is happening, so he asks for help from Holmes.