Hot Blood is The Godfather in Korean sauce, in the gloomy and sordid atmosphere of Busan, the sprawling port of Korea. If Seoul is Paris, Busan is Marseille. Its inhabitants are hot-blooded, the underworld holds the top of the pavement and the docks shelter all the traffic. Between Japan and its yakuzas in the east and China and its triads in the west. Guam, a squalid district of Busan, is run by Father Sohn, a gang leader who combines cowardice and cruelty. For twenty years, Huisu has been his faithful lieutenant and spiritual son. But Huisu is forty years old and can’t stand this pathetic life anymore. So when the opportunity arises, he leaves Father Sohn and tries to live an ordinary life with the woman he has loved since childhood. But to the community, the individual is nothing, and the war between the Guam clan and the Yeongdo clan will soon bring Huisu back to the heart of chaos.