Balsa the spearwoman is a wandering warrior, who takes on the task of saving lives, in atonement for a past sin. On her journey, she happens to save a prince, and is tasked with becoming his bodyguard. And he is going to need one, for his own father, the emperor, wants him dead.
Balsa, the spear wielder and bodyguard, is visiting the New Yogo Empire. She is hired to protect the Second Prince, Chagum, who is endangered because he is possessed by a being despised by his father, the Emperor, who ordered his assasination. The two go on a perilous adventure for the survival of the prince. Throughout the story, Balsa's past will come to light and they will uncover mysteries about Chagum's condition while developing a family-like relationship with each other and others.