Japanese sake is a gift that combines the traditional history of various places and the soul of the brewers. For winemakers, the most romantic thing is the process of chemical action of yeast to turn the wine into a clear body. What is passed down from generation to generation is not only the mellow secret of the family, but this mission also encourages the craftsmen to be obsessed with improvement. This film visits well-known breweries and tells the secrets of the birth of high-quality sake. Regardless of the quality of the water, soil, koji, yeast, or even the humidity of the wine storage, sparks are created through the collision of new scientific and technological knowledge and the wisdom of the ancestors, and we can also see the craftsmen's dedicated passion for this craft.