Going boldly is the spirit of Sherlock Holmes. Enola Holmes (Millie Bobby Brown), who has just tasted the taste of solving a case, is still not satisfied and decides to follow the footsteps of her brother, the famous detective Sherlock Holmes (Henry Cavill) and set up her own detective agency. She never expected that the business of a female detective would be so difficult. She had no choice but to accept the cruel reality of the adult world and was about to close down when the penniless match girl came to her door. Enola finally received her first business and was entrusted to find the lost sister for the girl. However, this case was much more complicated than she imagined, and Enola went into a strange place and fell into danger. She has been to London's gloomy and mysterious factories and magnificent music halls, mixed into the top upper class society, and even returned to 221B Baker Street. Enola realized that a bloody conspiracy was about to break out, and had to urgently call on her friends and brother Sherlock for help to help her out of the predicament. The detective game is getting exciting again!