A collection of documentaries focuses on prominent women from throughout world history who happen to be sisters. Each episode steps into the fascinating lives of a different set of sisters, looking at how they impacted society and history, but also the impact they had on each other's lives as sisters. From aviation hero Amelia Earhart and her sister Muriel, former First Lady Jacqueline Kennedy Onassis and her sister Lee Radziwell to Queen Elizabeth II and Princess Margaret, the series goes deep into the hearts and minds of sisters and what it means to be one.