凯伦麦肯井然有序的生活，因一名变态杀手闯入她家谋杀她17岁的女儿而整个破灭。但她的震惊悲伤转眼却变成愤怒怀疑，因为凶手在法律漏洞下竟被判无罪开释，所以当他又犯下另一桩血案且又逃过法律制裁后，凯伦决心亲手讨回公道……
Follows Philomena Cunk as she comically tells the story of our greatest inventions, and asks experts hard-hitting questions about humanity's progress.
