On Japan’s lush island of Shikoku lies the heart of indigo blue culture, a century-old tradition on the brink of disappearing. Watanabe and Kato, two indigo dyers at the forefront of this art, embark on an inner journey; one discovers the meaning behind his own shade of blue, while the other unravels a new way to see through his unique perspective on color. Together, they delve into the art of indigo — harvesting, fermenting and dying leaves to the rhythm of Japan’s four distinct seasons. As their paths intertwine, we follow them on their journey as they uncover the emotional and physical transformations that shape the color blue.