Residing in Osaka's impoverished districts, Kumada looks after his wife and two young children. He is a massive man covered in scars who works tirelessly, smokes, and drinks sake as though it were plain water; gruff and intimidating, he speaks little. Yet Kumada loves his family deeply and will defend them at the risk of his own life when members of a yakuza clan set his house on fire to clear the way for a real estate deal. Imprisoned for killing those who failed to burn his family alive, Kumada was released fifteen years later and reunited with them. He must now confront his children's distrust, as they know nothing of their father except that he abandoned them. However, he is resolved to take charge of their upbringing, beginning with his son, a street urchin abused by the local toughs.