By 1843, Anna Atkins had pioneered the use of cyanotypes to document marine botany, creating the first photographically illustrated book and significantly advancing the application of photogramming to scientific research in the 19th century. This is how "Lady Blue" was born, a discovery coming-of-age story driven by the imaginative power of curiosity, where each chemical immersion triggers a cascade of blue-tinted memories. Interweaving studies and personal experiences, the film traces Atkins' journey from childhood to her groundbreaking work with botanical cyanotypes. This visual journey culminates in the creation of her influential work—an ode to innovative documentation and an inspiration for women in science—serving as a powerful testament to her groundbreaking contributions.