• Cooperative investigation and mystery game set in Victorian London. • Includes 10 original cases designed by an author expert in the Sherlock Holmes universe. • Players take on the role of the Irregulars, a group of children who help the detective in his investigations. • Game mechanics based on interrogating suspects, consulting newspapers, and searching for clues in the streets. • Includes new narrative mechanisms to follow player progress and character arc development. • Standalone game suitable for both beginners and veterans of the Consulting Detective system.