The Moonstone, a priceless yellow diamond, is looted from an Indian temple and maliciously bequeathed to Rachel Verinder. On her eighteenth birthday her friend and suitor, Franklin Blake, brings the gift to her. That very night, it is stolen again. No one is above suspicion as the idiosyncratic Sergeant Cuff and Franklin piece together a puzzling series of events as mystifying as an opium dream and as deceptive as the nearby Shivering Sand.