In the mid-1970s, cult director Alejandro Jodorowsky (El Topo, The Holy Mountain) assembled the most extraordinary creative team ever put together for a single film — Salvador Dalí, Orson Welles, Mick Jagger, Pink Floyd, H.R. Giger, and Moebius among them — to create an adaptation of Frank Herbert's Dune that would have changed cinema forever. The film was never made. Frank Pavich's riveting documentary brings Jodorowsky's vision to life through storyboards, concept art, and the director's own passionate, unstoppable enthusiasm — a film about one of cinema's greatest unmade masterpieces.