Ms. Hong takes the envelope given by the Grand Empress Dowager containing evidence of the Imperial Family's corruption to the Prime Minister, but it never reaches him. The autopsy of the Grand Empress Dowager reveals poison was the cause of death, the same toxin found in the food the Empress had given her, and as a consequence, the police arrest the Empress for the murder. Meanwhile, the Imperial Family turns their back on Sunny.
"황실 감사원 회의를 막으려는 자가 범인이야!".
태황태후를 죽인 범인을 찾는 써니. 하지만 모두가 범인이고, 모두가 범인이 아니다?!
서로를 의심하는 이혁과 태후, 유라!
감추고픈 그 밤의 진실이 하나둘 모습을 드러내고, 써니 앞에 나타난 의외의 범인은..?
