On the brink of the Spanish Civil War in 1936, the young and impoverished Sira Quiroga finds herself in a captivating romance with her scheming lover, Ramiro. Together they flee Madrid for Morocco. Sira's infatuation blinds her to his true failings. Ramiro soon abandons her, penniless and in debt to the authorities. With no other option, Sira continues to rely on the only skill she possesses: sewing. Under the tutelage of the faithful but caring housekeeper Candelaria, Sira begins making clothes for the glamorous English and German ladies of Tetouan. Thanks to their exuberant gossip, Sira becomes an indispensable source for British Intelligence, a role fraught with great risk. 'The Seamstress' is an extraordinary wartime story of danger, espionage, love, and war, set during World War II.