Avant-garde dancer and choreographer Sally Gross has been dancing for more than fifty years.  Documentary legend Albert Maysles and co-director Kristen Nutile chronicle the New York dancer’s celebrated career with breathtaking archival performance footage and follow her, verité-style, for eight months as she and her inspired troupe prepare a new piece. Part biography, part performance film, this is a portrait of an accomplished and enduring artist at work. TM