东晋咸康年间，琅琊王氏凭借门阀权势在建康城郊修建地下囚宫，掳掠平民女子充作私奴。寒门才女谢清漪被掳后，在残酷的调教中暗中观察王府运作规律，结识女侠慕容雪等囚友。众人历经鞭笞、缚足、刑具折磨而不屈，利用士族间的权力斗争策划越狱。最终在乌衣巷宴之夜引发暴动，揭露士族罪恶，撼动门阀统治根基。

During the Yongle era, Princess Zhaoren, Zhu Qingyao, was imprisoned in the Imperial Prison due to her uncle's involvement in the Lan Yu case, a fabricated accusation. The banner officer, Hu Bao, was ordered to subject her to a special punishment, ranging from humiliating bondage to brutal foot torture. Amidst the alternating torments of stockings and bare feet, the princess transitioned from despair to awakening, engaging in a psychological game by observing Hu Bao's weaknesses. When the foot torture endangered her life, she utilized knot-tying skills learned in Ryukyu years prior to set a counter-trap, ultimately exposing the conspiracy of the Censor Xu Shizhen and overturning the verdict on the execution ground.