A mother moves into an old family home to undergo a rigorous treatment that she hopes will help her autistic daughter communicate. The therapy seems successful when the girl miraculously begins to speak. However, she soo…

　　1971 年，四名女性不顾极端保守的规范，加入了墨西哥第一支女子警察部队，却发现这只是为了分散媒体对连环杀手的注意力而采取的宣传噱头。随着尸体数量的增加，她们约定将凶手绳之以法。