The film takes us to London in the fifties and sixties, a decade ago. In those years we are going to see brothers Ronald and Reginald Kray, two twins who control the mafia London.
They are engaged in all kinds of activities that are expected of two gangster like them, ie to extort, steal, murder and ultimately everything that gives money fast without too much work.
The brothers spread terror and influence throughout an area of London, but there are problems among them. The biggest is that Ronald is a very troublesome man, because he is actually a psychopath, which makes him not think clearly and that his brother always have to be attentive to control it.
In addition, Reginald’s wife is tired of her husband leading the life she leads, so she will do her best to stop the illegal business, something that would mean the immediate fall of Ronald.