Becoming Astrid chronicles the life of Astrid Lindgren, the acclaimed author of the beloved Pippi Longstocking series. The film explores her formative years, including her teenage pregnancy and the subsequent struggles she faced as a single mother in 1920s Sweden. Despite the judgment and disapproval of her conservative community and strict religious family, Astrid pursued her passion for writing and eventually became one of the most celebrated authors of children's literature. The film portrays the challenges she faced and the triumphs she achieved as a woman who refused to conform to society's expectations and instead followed her calling.