Source plot synopsis — includes the ending
The brothers eventually encounter a savage group of tribesmen and save a young girl from being sacrificed. While assisting the brothers on their journey, the girl begins seducing Naia, much to Naiee's dismay, and tricks them into entering a cave. Once inside, she reveals herself as a monstrous spider creature who tries to eat the brothers, but they manage to thwart and kill her by pulling off her legs, but not before she mortally wounds Naia. Nearing the end of their journey, the brothers reach the Tree of Life; Naia insists that Naiee venture on to reach the top of the tree. Naiee collects the Water of Life but, as he returns to the bottom, he finds that Naia has already died from his wound. Unable to revive him using the water, Naiee buries and grieves for his older brother before returning to the village.
Upon reaching the shoreline, Naiee must face his inability to swim in order to get the waters to his dying father. His mother's spirit appears to comfort and motivate him and, with Naia's spiritual guidance, Naiee is able to force himself to swim to the village. He is able to give the doctor the water, and the father recovers from his illness overnight. A short time afterwards, Naiee and his father mourn at the tombstones of both the mother and Naia.
Sources and content license
Source and revision history ↗ · Adapted from Wikipedia contributors, Brothers: A Tale of Two Sons. Section headings and formatting adjusted. · Content license