chunk: The film begins in September 2008 (opening against the backdrop of news of the Islamabad Marriott Hotel bombing) with an elderly Lady Thatcher buying milk unrecognized by other customers and walking back from the shop alone. Over the course of three days, we see her struggle with dementia and with the lack of power that comes with old age, while looking back on defining moments of her personal and professional life, on which she reminisces with her (now-dead) husband, Denis Thatcher, whose death she is unable to fully accept. She is shown as having difficulty distinguishing between the past and present. A theme throughout the film is the personal price that Thatcher has paid for power. Denis is portrayed as somewhat ambivalent about his wife's rise to power, her son Mark lives in South Africa and is shown as having little contact with his mother, and Thatcher's relationship with her daughter Carol is at times strained.