Sought for their beauty, the finest Japanese swords of the modern age are in constant demand, selling for millions of yen. These swords are made by Yoshihara Yoshindo (78), the greatest modern-day swordsmith. Using techniques passed down for over 1,000 years, he turns steel into the most extraordinary treasures. We follow the 4 months it takes to create a sword, from its beginning as a clump of steel known as Tamahagane, to its magical transformation into a distinguished blade. Overcoming the death of his son -- his successor -- and illness of his own, Yoshihara continues to pursue ever greater heights. What conviction drives his way of life?