Former boxer Daishiro lost his wife, and his only son, Kaoru, went missing, it was a heavy blow for Daishiro. One day, Daishiro got a call from his relative Morihiko. He said he forgot the winning lottery ticket of 2 million yen at the hotel, so he wants Daishiro to go and pick it up. Morihiko used the hotel for secret meetings, so he said he couldn't go there himself because he was afraid it would become public. When Daishiro entered the hotel, the Yakuza, who learned about the lottery from the newspaper, threaten the hotel maid Noriko, and want to rob her. Daishiro helps Noriko and safely picks up the lottery, but a message arrives from his relative Seikichi from Osaka. His missing son Kaoru is said to be a boxer in Osaka. "My son... He has the blood of a boxer in him..." Daishiro is heading to Osaka in a hurry...

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