In 1960s London, the Kray twins are ascending to power, employing their unique brand of violence to dominate the city. Enter Detective Nipper Read, a courageous officer tasked with the daunting mission of restoring law and order by confronting the nation’s most notorious gangsters. As he navigates corrupt police officers, political betrayals, and intimidated witnesses, Nipper’s obsession with his mission grows, endangering all that he holds dear.