An Inspector Calls unfolds in an English industrial city, where a young girl has tragically committed suicide. A respectable British family finds themselves under scrutiny as an inspector arrives to interrogate them about their connections to the deceased.

As the questioning progresses, each family member is revealed to have played a role, whether lightly or deeply, in the girl's demise. Initially portrayed as a closely-knit and amiable group, the family's true nature is exposed, revealing selfishness, cowardice, and self-centeredness. Their good humor and camaraderie deteriorate into acidic disdain and dislike as the evening unfolds.

The play takes a surprising turn with a revelation about the inspector, making it a gripping narrative that delves deep into themes of morality and social responsibility.