Zhang Xiao (Cecilia Liu), a young woman from the 21st century, suffers a near-fatal accident that sends her back in time to the Qing Dynasty during the Kangxi Emperor's (Damian Lau) reign. She finds herself trapped in the body of one of her previous incarnations: Ma'ertai Ruoxi, the teenage daughter of a Manchu general. In this new timeline, she has an elder sister, Ruolan (Annie Liu), who is a concubine of the Kangxi Emperor's eighth son, Yinsi (Kevin Cheng). Ruoxi initially tries to return to the future, but she soon adjusts to life in this era. She meets some of Kangxi's other sons, including the fourth prince Yinzhen (Nicky Wu), tenth prince Yin'e (Ye Zuxin), and fourteenth prince Yinti (Lin Gengxin). She also forges a close friendship with the thirteenth prince, Yinxiang (Yuan Hong).  During Ruoxi's stay in Yinsi's house, Yinsi falls in love with her. She initially rejects him but later agrees to marry him if he gives up competing for the succession to the throne. Since she is from the future, Ruoxi is aware that Yinsi's ambition will ultimately lead to his death in prison after Yinzhen becomes emperor.  After breaking up with Yinsi, Ruoxi's interaction with Yinzhen changes her unfavorable opinion of him, and she unwittingly falls in love with him. Meanwhile, Yinsi and his supporters, acting on Ruoxi's advice, frame Yinzhen for plotting against the crown prince Yinreng (Zhang Lei). Yinxiang steps forward to take responsibility and is ultimately sentenced to house arrest. After this incident, Yinsi realizes that Ruoxi is now romantically involved with Yinzhen. Yinreng is deposed after his criminal ways are exposed and is imprisoned for life. Kangxi then begins showing preference for Yinti and offers Ruoxi as a concubine to him. However, Ruoxi boldly defies the emperor's order, and as a penalty, she is demoted to the laundry department.  Kangxi eventually dies of illness, and with military support from Longkodo (Zhao Jialin) and Nian Gengyao (Xing Hanqing), YiWatch drama online for free.