A mystery of a serial murder case occurring in the palace A thriller of the inner court ladies battling against a murderer In a jungle-like palace, the fascination and indulgence of two girls begin A brutal tale of two women who entered the palace to protect each other After losing her parents in the chaos, Hyang-i is taken in by Sun-ok's father. From that moment, Sun-ok and Hyang-i grow up like real sisters, but as Sun-ok's father starts selling Hyang-i to wealthy old men, they realize their positions are different. The powerless young girls, dragged around without any strength, struggle to endure the horrific world through their love and bond, but even that is not easy. Suddenly, the political machinations that reach out to them push them into an inescapable fate. Later, Sun-ok is chosen as the queen consort due to a conspiracy by the royalists to check the crown prince, and shortly after, Hyang-i enters the palace as the blade to execute the plan. Caught between the living power of the king and the newly risen power of the crown prince, the two girls join hands and begin a fateful race solely for survival. A mystery thriller novel by an award-winning author of the Korea Story Contest.