In the land of Aetheris, humanity lives under the tyrannical rule of demon lords, their reign unchallenged and feared by all. Within this realm of despair, a group of cursed samurai, each possessing unique demonic powers, battles for survival and dominance. Seventeen-year-old Ryuji, driven by a deep-seated desire for revenge, seeks the truth behind his father's murder. As he navigates the treacherous path of vengeance, Ryuji's journey intertwines with fate, loyalty, and the dark secrets of Aetheris, revealing the true cost of his quest.