Birling family gathers to celebrate the engagement of their daughter, Sheila, to Gerald Croft. Set in 1912, the play unfolds in the Birlings' lavish dining room. Mr. Birling, a prosperous businessman, gives a speech emphasizing his capitalist beliefs and predicting a future of progress and prosperity. However, their festivities are interrupted by the unexpected arrival of Inspector Goole, who informs them of the suicide of a young woman named Eva Smith. The Inspector's investigation begins, unraveling the family's secrets and revealing their connections to Eva's tragic fate.