宫女孟凡和孟芙是一对姐妹花，她们原本只是深宫里的普通宫女，却在武则天挑选宫女时，身不由己陷入皇权争斗之中，孟凡在太监小马的帮助下，步步为营，才在这腥风血雨的宫中获得一线生机。孟凡在韦后想做第二个女皇帝的混乱之中认识了上官婉儿，两人成为闺蜜。而她妹妹孟芙则被野心勃勃的安乐公主利用，除掉了太子李重俊

孟凡成为太平公主的眼线，潜入李隆基身边，谁知两人却互生情愫。李隆基不甘心看到中宗昏庸，韦后把持朝政，一心想夺回大唐江山，于是为了帮李隆基夺得天下，孟凡成为了唐中宗的妃子，她揭露韦后和安乐公主的阴谋，却逼得韦后狗急跳墙，下毒害死中宗，太子李重茂成为新帝，韦后被尊为太后。孟凡帮助李隆基发动政变，但是政变成功后，孟芙和上官婉儿都死于非命。

The maids Meng Fan and Meng Fu are a pair of sisters. They were just ordinary court ladies in the deep palace, but when Wu Zetian chose the palace maids, they couldn't see each other. Caught in the struggle for imperial power by himself, with the help of the eunuch Xiao Ma, Meng Fan managed every step of the way to survive in this bloody palace. Meng Fan met Shangguan Wan'er in the confusion of Empress Wei's desire to be the second empress, and the two became best friends. But her younger sister Meng Fu was used by the ambitious Princess Anle to get rid of Prince Li Chongjun

Meng Fan became the eyeliner of Princess Taiping and sneaked into Li Longji's side, but they fell in love with each other. Li Longji was not reconciled to seeing Zhongzong's stupidity. Empress Wei took control of the government and wanted to regain the Tang Dynasty. So in order to help Li Longji win the world, Meng Fan became Tang Zhongzong's concubine. She exposed the conspiracy of Empress Wei and Princess Anle, but Empress Wei was forced to jump over the wall in a hurry and poisoned Zhongzong to death. Prince Li Chongmao became the new emperor, and Empress Wei was honored as queen mother. Meng Fan helped Li Longji launch a coup, but after the coup succeeded, both Meng Fu and Shangguan Wan'er died unexpectedly.