Set in the 1990s during the rise of organized crime in Busan, “Nameless Gangster: Rules of the Time” follows the story of Choi Ik-hyun, a low-level customs officer who becomes embroiled in the world of gangsters. As he partners with a powerful crime boss, the film explores themes of loyalty, betrayal, and ambition, showcasing the clash between law enforcement and the burgeoning mob scene. The movie is a gritty portrayal of the underbelly of society and the moral complexities faced by its characters.