After the death of his grandmother Emma, Hunzinger discovered a collection of letters from an enigmatic sender named Marcelle. Through the letters it transpires that Emma and Marcelle were schoolgirl sweethearts in the 1920s. After parting ways, Marcelle succumbs to tuberculosis and is admitted to a sanatorium. However it’s here that she forms a rebellious gang of kindred spirits – who become confidantes and lovers – dubbing themselves the ‘Blood-Spitters Gang’. Weaving together Marcelle’s letters with archive footage, photographs and scenes from classic films such as Mädchen in Uniform, Hunzinger thrillingly brings to life this extraordinary true story.