The documentary explores the color red through interviews with artists, opticians, psychologists, fashion designers, sports teams, and filmmakers. It discusses how red is used in optometry, fashion trends set by Karl Lagerfeld, the rivalry between Liverpool and Everton football clubs, and how Coca-Cola changed its branding from black and white to color advertising. The documentary contrasts the use of color and black and white in historical films and how new technology has advanced the use of color in modern cinema.