Balsa, spear wielder and bodyguard, is a wandering warrior who has vowed to atone for eight deaths in her past by saving an equivalent number of lives. On her journey, she saves Prince Chagum and is tasked with becoming his bodyguard. His own father, the Mikado, has ordered his assassination. The two begin a perilous journey to ensure the survival of the prince. Balsa's complicated past begins to come to light and they uncover Chagum's mysterious connection to a legendary water spirit with the power to destroy the kingdom.