Balsa is a 30-year-old female bodyguard-for-hire. Her life changes when she saves Imperial Prince Chagum, who is being carried away by a raging river. They then attempt to return the great egg of the water spirit, which is in Prince Chagum's possession, to its source in the sea. Along the way, they are hunted by hired assassins. (Source: AsianWiki) ~~ Adapted from novel 1 in the novel series "Moribito Series" (守り人シリーズ), namely "Moribito: Guardian of the Spirit" (精霊の守り人), by Uehashi Nahoko (上橋菜穂子).