The Strange Case of Dr. Jekyll and Mr. Hyde

Robert Louis Stevenson's The Strange Case of Dr. Jekyll and Mr. Hyde follows London lawyer Gabriel John Utterson as he investigates a disturbing connection between his respected friend, Dr. Henry Jekyll, and the violent Edward Hyde. Jekyll's unusual will, Hyde's freedom to enter his laboratory, and a series of alarming incidents suggest that the doctor is being controlled or threatened.

Utterson's inquiry develops through guarded conversations, sealed letters, and testimony that can be understood only after Jekyll disappears. Dr. Hastie Lanyon, once Jekyll's friend, witnesses an event so shocking that it destroys his health. When Utterson and Jekyll's servant finally enter the locked laboratory, the evidence forces them to reconsider the apparent boundary between the two men.

Jekyll's own account reveals an experiment intended to separate conflicting parts of his personality. The freedom offered by Hyde gradually becomes a loss of control, turning secrecy into danger. Stevenson combines a legal mystery with Gothic horror and speculative science, using the transformation to explore responsibility, repression, reputation, and the divided pressures of public and private life. The novella asks whether a person can isolate unwanted desires without also surrendering moral agency.