When the Brightwater River suddenly begins flowing the wrong direction, a determined young villager named Mira and a weary fisherman named Bran travel into the northern mountains to find the legendary River Stone that holds the river’s memory. Guided by the stone’s ancient voice, they discover that a fallen slab has buried the carvings that remind the river of its path. By uncovering the lost memory at the river’s source, they restore the Brightwater’s flow and return life and balance to the valley.