A young British student (Abhin Galeya) is gradually indoctrinated into a Muslim cell bent on revenge after the "War on Terror", and is pursued by a government agent - Sean Bean - who is pretty much given a clean slate by his boss Charlotte Rampling. The story is told via parallel timelines in which we discover what has driven both men to their current courses of action; and whilst it does use some fairly sweeping stereotypical generalising for plot development, the characterisations delivered by both - especially Galeya - are quite revealing as a potential explanation for extremes in behaviour...