Filmmaker Nick Broomfield explores the troubled life and deadly end of female killer Aileen Wuornos, the woman behind Charlize Theron's Oscar-winning role for Best Actress in Monster. Filmed after Wuornos was imprisoned but before she was put to death, the documentary highlights the media blitz surrounding her case, culminating in interviews with Wuornos as well as her lawyer, her lover and her adoptive mother.