Enter Sherlock Holmes.Albert d'Andresy, disguised as Lord Faulkner, steals a movie poster from Faulkner's collection, but he is apprehended by Inspector Lestrade, assisted by Sherlock Holmes. Holmes has been taking it easy solving low-stake cases, while caring for a schoolgirl named Lily. Albert attempts to escape and is shot, but is rescued by Lupin and his crew, who are investigating the mysterious "Raven" society and their hidden treasure. During the commotion, the poster is cut in half, Lupin's crew getting one half and the police retrieving the other. While Lord Faulkner is being held at Scotland Yard for interrogation about the significance of the poster, a "Raven" agent plants a bomb on him, killing him and destroying part of the building...