This film tells the story of a group of black female mathematicians who worked on the early NASA space programme. This being a time when the US was still racially segregated, the women had to endure “coloured only” bathrooms and even segregated water fountains while contributing to the space race with the Soviet Union. The film focuses on three women in particular, who are friends. Katherine Johnson is the most brilliant mathematician, drafted in to help NASA calculate flight trajectories in an age when computers were in their infancy and most calculations had to be done by hand.