Yuna lives on a remote Ryukyu Island in Japan, dividing her time between studies and tending the home for her father, a stoic sugar cane farmer. For reasons unknown to Yuna, her father has been ostracised by the rest of his family. Like generations before her, Yuna will move to the big island of Okinawa to finish her education, but before she leaves she must lead her traditional music circle in a farewell concert. Leaving on the 15th Spring provides a sensitive and poignant impression of a young girl on the cusp of adulthood, torn between the alternately attractive and conflicting natures of tradition and progress.