Extremist attitudes are on the rise throughout the Western world. In a bid to understand why, broadcaster Alice Levine is spending a week living with British nationalist Jack Sen, his wife of Ukrainian heritage, their young daughter, and Jack's mother - whose hero is Donald Trump. As a liberal who embraces diversity and tolerance, Alice aims to understand why Jack holds the views he does and attempts to dig deeper into what leads people to fanaticism. Jack, a nationalist activist who uses the internet to spread his message, stood for election as a UKIP MP, but was expelled from the party for sending tweets considered anti-Semitic to Labour MP Luciana Berger.