Welcome, Sensation Seekers, To Knife Edge. In a Britain on the edge of collapse, duelling with blades has now been legalised. On Saturday nights, the nation sits down to watch the country's best amateur fighters slash it out on prime time. The streets are red with blood. The skies are black with polluted horror. High walls have been built around Britain and endless winter is coming. In search of a missing boy, ex-Special Forces agent Josh Cumberland delves into the dark underbelly of the knife culture that has infected his country, but what he finds will shock him to his soul.