The Moonstone a priceless Indian diamond which had been brought to England as spoils of war is given to Rachel Verrinder on her eighteenth birthday. That very night the stone is stolen. Suspicion then falls on a hunchbacked housemaid on Rachel's cousin Franklin Blake on a troupe of mysterious Indian jugglers & on Rachel herself. The phlegmatic Sergeant Cuff is called in & with the help of Betteredge the Robinson Crusoe-reading loquacious steward the mystery of the missing stone is ingeniously solved.