Kintaro Yajima comes to Tokyo and is hired by Yamato Construction Company when he saves the life of the company's CEO. A former leader of a motorcycle gang, Kintaro is known for his highly principled and forthright way of dealing with matters and is never afraid to tell his superiors exactly what he thinks. This has a tendency of irritating some; but when corruption from within the company begins to surface, he may be the only one who can stand up to it.
Following the death of his mentor, Yamato Construction chairman Yamato Ryunosuke, and tired of the Japanese corporate system, Kintaro leaves the salary man life. He returns to his hometown and becomes a fisherman. There he lives peacefully with his wife Masumi and their two children. Then an unexpected visitor arrives. It is Ryunosuke's younger cousin, Momotaro Shimazu. Momotaro puts a strange request to Kintaro - come back to Yamato Construction and work with Ryunosuke's son Ryuhei to rid it of its current management. Current Yamato president Takatsukasa has given in to pressure from ex-bureaucrat Enjoji and is about to become his accomplice in a shady scheme. Kintaro's sense of honor is rekindled.