The maid in charge, Shen Yan, has assisted the Seventh Prince Chu Ning Yuan in seizing the heir since she was a child. The two, who also had tragic experiences, became cold-hearted in order to seek revenge and seize power. They are used to seeing the dark, and the few warmth is only left to each other. Chu Ning Yuan gradually fell in love with Shen Yan who was always by his side, but Shen Yan was indifferent to his love, and even took the initiative to match Chu Ning Yuan to marry the daughter of a powerful minister in order to destroy the prince's plan to stabilize his power by choosing a concubine. Chu Ning Yuan saw Shen Yan's intentions in his eyes, and became more paranoid in his actions, determined to keep Shen Yan by his side.

心狠手辣的掌事宫女沈颜，从小辅佐七皇子褚宁远夺嫡。为了破坏太子选妃稳固权势的计划，沈颜主动撮合七皇子与权臣之女结亲，可褚宁远喜欢的一直是陪在身边的沈颜。沈颜因早年悲惨的经历，对男女之情有阴影，心中只有复仇大计，所以选择对褚宁远的爱意视而不见。而褚宁远对沈颜的付出，最终一步步打开了她隐藏起来的内心……

집사 궁녀와 황자의 신분 차이 로맨스 어머니의 출신이 천하다는 이유로 천대 받던 7황자 저영원과 억울한 누명을 쓰고 가족을 잃은 궁녀 심안은 서로의 복수를 위해 손을 잡는다. 하지만 저영원은 남몰래 심안을 짝사랑하는데...