Beneath valleys situated near a glacier, a small kingdom struggles to survive. The kingdom is home to many residents who live alongside herds of red elk, yet the land and its produce barely sustain the population. Despite their poverty, the people dedicate themselves to their work and have accepted their modest condition. However, Shuna, the country's young prince, refuses to accept this situation. After receiving mysterious grain seeds from a dying traveler, Shuna embarks on a quest for the land of golden grain to change his kingdom's fate. Along his journey, he discovers strange places and hears many unsettling rumors about his destination. Shuna witnesses the horrifying realities of human slavery: he encounters two young girls, Thea and her younger sister, who have been taken into captivity. Facing a new dilemma while determining the golden grain's whereabouts, Shuna resolves to still achieve his goal.