A young Spanish seamstress travels to Morocco in the late 1930s and ends up building a new life for herself in Tetouan, where she establishes a flourishing dressmaking business. Drawn into the world of wartime espionage, she becomes an unlikely spy passing intelligence to the Allies whilst maintaining her cover as a respected couturière. Her work brings her into contact with powerful figures on all sides of the conflict, forcing her to navigate dangerous loyalties and personal sacrifices.