For decades, the criminal underworlds of the UK's North and South got along begrudgingly. Like the Cold War, territories were respected out of the necessity to avoid apocalypse, with each side covertly keeping tabs on the other’s capabilities. Such a precarious false harmony could not last forever. Now someone has crossed the line and there’s no going back. An illicit love affair smoulders, breaking taboos and it is a romance of pure, unadulterated love, so forbidden that its discovery alone will wreak unbridled carnage.