The Last Godfather.

Young-goo the son of mafia boss Don Carini, is too foolish to be part of the mafia elite. One day, Young-goo comes to his father and is trained by Tony V to be his father's successor. A few days later, Young-goo accidentally rescues Nancy, the only daughter of Don Bonfante, the boss of a rival mafia family. But Vinnie, an under-boss of the Bonfante family kidnapped her and fabricates that Young-goo has taken her. Vinnie's behavior provokes an armed conflict between the two families.