Joseph Hillel's new documentary explores how four trailblazing architects – all female – have helped transform our cities.Phyllis Lambert, Blanche Lemco van Ginkel, Cornelia Hahn Oberlander, Denise Scott Brown have collaborated with some of the leading figures in architecture, from Le Corbusier to Louis Kahn and Mies van der Rohe, while finding their own voices in this male-dominated profession.Through interviews, archival material and stunning cinematography, Hillel uncovers how each of these independent thinkers has been working, observing and thinking about the transformations shaping the city of today and tomorrow.