The Adventure of the Empty House

Ronald Adair, a quiet young man whose only hobby was playing cards, is found dead. Watson attempts to solve the case but without success. One day he examines the area around the victim's house and encounters a strange old man. Who is he? Could he be the murderer who returned to the crime scene in disguise, or simply a witness? Will Watson discover what happened using Holmes's methods, or will that not be enough? Find the answers in "The Adventure of the Empty House," part of The Return of Sherlock Holmes.