In this classic tale by Sir Arthur Conan Doyle, Sherlock Holmes recounts one of his earliest cases. He is approached by a former university acquaintance, Reginald Musgrave, about the bizarre disappearance of two staff members. The only clue is a strange, centuries-old family catechism known as the Musgrave Ritual. Holmes's brilliant deductive mind unravels the cryptic verses, revealing a hidden treasure map that leads to the solution of the disappearances and uncovers a priceless historical artifact.