Synopsis: Maya Angelou may be eminently qualified for her position as America's poet laureate, but her skills as a scriptwriter areat play in Sister Sister. Diahann Carroll plays a Southern schoolteacher who lives in the large house willed to her by her pullman-porter father; here she takes care of younger sister Irene Cara, striving to keep the girl on the straight and narrow. Into this proper household descends Carroll's other sister, Rosalind Cash, an uninhibited swinger. The inevitable confrontation is ... Full Synopsis