The document describes the set and characters of the play 'An Inspector Calls,' detailing the Birling family's dining room setting in early 20th century Britain. It introduces the main characters: Arthur Birling, his wife Sybil, their children Sheila and Eric, their guest Gerald Croft, and the maid Edna, as they celebrate an engagement. The description highlights the interactions and characteristics of the family members, reflecting themes of social class and the impending changes in society.