An unfortunate car accident caused Zhang Xiao to dream about her unforgettable love with "Fourth Prince." One fateful day, she meets a man who looks just like the "Fourth Prince" in her dreams. He is Yin Zheng, the stepson of Zhen Tian Corporation's chairman. To find out what his relationship is to "Fourth Prince," she finds work as a designer at Zhen Tian. However, fate plays with her again. Just as she's about to solve this mysterious riddle, an accident occurs, causing Zhang Xiao to lose her memory. Now with no more worries, Zhang Xiao works diligently at Zheng Tian. She gets to know Lan Lan, Yin Zheng's supermodel girlfriend who looks just like her, the carefree Kang Si Yu, and the considerate and mysterious Kang Si Han. It turns out that Yin Zheng, Kang Si Han, and Kang Si Yu are all potential successors of Zhen Tian Corporation. Zhang Xiao suddenly finds herself in the center of a power struggle.

After a terrible car accident, 25-year-old Zhang Xiao (Liu Shi Shi) travels from modern-day China back to the 18th century. She is incarnated as one of her previous lives – that of 16-year-old Maertai Rouxi, the daughter of a Manchu general, during the Qing Dynasty. When attempts to return to her life in the future fail, Rouxi tries to adjust to her new life in the court of Emperor Kangxi but soon becomes entangled in the crown princes' struggle to succeed the throne. With her modern-day knowledge, Rouxi toys with history in her romances with the 8th prince, Yin Si (Kevin Cheng), and 4th prince, Yin Zhen (Nicky Wu), while sharing the confidences of the 13th prince, Yin Xiang (Yuan Hong). Will Rouxi be able to return to her modern-day life or is she destined to live out her life in the past?