An Inspector Calls is a play written by J. B. Priestley. The story focuses on the wealthy Birling family, whose members are questioned by a mysterious inspector about their involvement in the death of a young woman. As the investigation unfolds, each character is forced to confront their own actions and responsibility. The play explores important social themes such as class inequality, moral responsibility, and the consequences of selfish behavior. Priestley uses the inspector as a dramatic device to highlight the importance of social awareness and collective responsibility in society.