A female spy infiltrates the inner chambers of an old estate, determined to uncover the mystery behind the string of missing maids. However, she falls into the enemy's trap, is captured, and subjected to relentless torture. The torment she endures is an unimaginably sadistic ordeal—brutal physical and psychological agony that breaks both body and mind. As she struggles to survive and seeks escape by any means necessary, she becomes entangled in an ever-deepening web of mystery, questioning her true purpose and the reality of her mission.