The third 'Platinum Family Crest' film.

In 1978, at the Kyoto nightclub "Barami," Ryuji Kagawa (Toru Minegishi), boss of the Yamada-gumi, was gunned down. The man targeting the leader of Japan's largest organization was Wataru Naruse (Kazuyoshi Ozawa) of the Nihon Makoto-kai. This is the story of a reckless conflict—likened to "ants" challenging a "giant elephant"—as men, seeking vengeance for their boss, the first president of the Nihon Makoto-kai, Katsuichi Yoshimura (Hitoshi Ozawa), take on Japan's largest organization.

In order to settle a business dispute, a mob leader murders one of his own teenage sons. The surviving son vows to avenge his brother's death, and organizes his own gang of teenage killers to destroy his father's organization.