The title refers to four girls, three days, two cities (London and New York) and one chance, and it's a flash-trash thriller that covers the same overlapping events from the viewpoint of four twentysomething London girls who accidentally become involved in the aftermath of a big diamond robbery in Amsterdam. It's rather like an underwear advertisement with aspirations to be a British version of Kubrick's The Killing and does little to enhance the reputation of its co-director and co-star Noel Clarke.