The Rules of a Gangster

The film focuses on Sung-chul, a Korean gangster portrayed by Park Joong-hoon, who flees to Japan after committing murder. He encounters He-gu, played by Park Sang-min, an aspiring bartender who discovers his secret and is forced to assist him. Their relationship evolves amid betrayal and violence as they navigate the perilous yakuza landscape.

As Sung-chul advances within the ranks of the yakuza, He-gu becomes increasingly embroiled in the criminal activities. Despite his clumsiness, He-gu's determination helps him survive treacherous power struggles and personal losses. However, reckless choices lead to dire consequences, culminating in a tragic climax where Sung-chul must confront his own actions and the fate of He-gu.