 In the Nineteenth Century, in Japan, the arrogant and proud just-graduated Dr. Noboru Yasumoto (Yuzo Kayama) is forced to work in the Koshikawa Clinic, a non-profit health facility ruled by Dr. Kyojio Niide (Toshirô Mifune), a.k.a. "Red Beard". "Red Beard" is a good, sentimental, but also very firm, strong and fair man. While in the clinic, Dr. Yasumoto becomes responsible for healing the hurt teenager Otoyo (Terumi Niki), and he learns a lesson of humanity, becoming a better man.