Monster is a biographical crime drama that tells the story of Aileen Wuornos, a prostitute turned serial killer. The film explores Wuornos' troubled past and the events that led her to commit a series of murders. Charlize Theron delivers a transformative performance as Wuornos, earning her an Academy Award for Best Actress. Monster is a haunting and thought-provoking film that delves into the complexities of the human psyche.