Codename Yuna. She has identified a high-ranking member of the evil organization known as Black Moon—the mastermind behind an underground fighting tournament. To expose the organization's conspiracy, she attempts to make contact. Yuna's undercover investigation fails, resulting in her capture. Forced to participate in the fighting event to protect her family, she endures humiliation as the loser's punishment. Though she fights back and challenges for a loser's rematch, her second defeat leads to ultimate degradation.