Hari, who entered the palace as a eunuch in place of her older brother, lived a peaceful life, far from the fears she once had… until she was summoned to the quarters of the Gran Prince Sohyeon, Lee Ryeong. —"From now on, you will serve Gran Prince Sohyeon at night". That very night, Hari is ordered to make “that” of Lee Ryeong stand erect, and to make matters worse… he finds out she’s a woman! —"You… you’re a damn woman." Will Hari be able to escape this palace alive?