From the Introduction: Adventure on the streets of old London Town, giving aid to the greatest detective who ever lived - Sherlock Holmes. The master sleuth knows the criminal mind like no other, but he can be in only one place at a time. That's where you come in. Holmes employs a ragtag group of street urchins for a shilling a day plus expenses, with a guinea for any who discover a vital clue. He calls his eyes and ears the Baker Street Irregulars.