Joan Rivers launched her career as a standup comic in the early '60s, a time when female comedians were few and far between, and after several years of working nightclubs to unresponsive audiences, she was booked on THE TONIGHT SHOW STARRING JOHNNY CARSON in 1965 and soon became one of the most successful comedy acts in the nation. Since then, Rivers has hosted several TV talk shows, written best-selling books, directed a feature film, launched a line of jewelry, and kept up a busy schedule of personal appearances, determined to hold on to her stardom regardless of the fickle winds of show business. Filmmakers Ricki Stern and Annie Sundberg followed Rivers through a typically eventful year in her life, and in JOAN RIVERS: A PIECE OF WORK, they offer a look at the woman behind the laughter as she struggles to stay in the spotlight, works on new material, launches a one-woman show in the United Kingdom that doesn't fare as well as she hopes, takes a chance as a participant on a reality TV show, and ponders her career in show business at the age of 75. JOAN RIVERS: A PIECE OF WORK received its world premiere at the 2010 Sundance Film Festival.