Profiles ten nuns and the causes to which they've dedicated their lives. Meet, for instance, Sister Simone Campbell, who traversed the United States challenging a Republican budget that threatened to severely undermine the well-being of poor Americans; Sister Megan Rice, who's willing to spend the rest of her life in prison if it helps eliminate nuclear weapons; and the inimitable Sister Jeannine Gramick, who's fighting for acceptance of gays and lesbians in the Catholic Church.