A film about a juvenile delinquent who swears, yet fails, to rehabilitate.

Unlike traditional gangster movies, it is a gangster swashbuckler that mixes romance and humanity with a yakuza lover as the main character. A young man who heard that his former boss was killed is imprisoned by slashing his family's minions, and his lover is tortured by the enemy, but rescued by the imprisoned young man's nemesis.

Kitagawa is an engineer charged with construction of a gigantic tunnel through the Japan Alps for the transportation of equipment in the building of the massive Kurobe Dam. The tunnel crosses an earthquake fault and Kitagawa is beleaguered not only by cave-ins and flooding, but by strife between management and the workers's union. Adding to Kitagawa's stress is the knowledge that as his attention is pulled inexorably toward the tunnel construction, his youngest daughter is dying from leukemia.

A young man with a strong sense of justice is torn between two girls: the flighty Taneko and the serious Suzuko. With wisdom, courage and honor in a Japanese spirit of manliness he wins the day.