Nagisa, a young and principled employee working in the accounting department, senses something suspicious about the company's opaque expense management and decides to uncover the truth. However, hidden within the company is a top-secret project known as the "N Incident." Under the pretext of a training session, Nagisa is summoned and gradually dominated physically and mentally by the male executives. Caught between her beliefs and harsh reality, she begins to waver, awakening to a new, submissive version of herself.