The novel begins as John Jasper leaves a London opium den. The next evening, Edwin Drood visits Jasper, who is the choirmaster at Cloisterham Cathedral. Edwin confides that he has misgivings about his betrothal to Rosa Bud. The next day, Edwin visits Rosa at the Nuns' House, the boarding school where she lives. They quarrel good-naturedly, which they apparently do frequently during his visits. Meanwhile, having an interest in the cathedral crypt, Jasper seeks the company of Durdles, a man who knows more about the crypt than anyone else.