Ruan Xi takes the place of her elder sister, Ruan Qing, who fled her arranged marriage to join the army, and marries Xue Yuchen, a spoiled young heir known as the Little Tyrant of the Capital. To keep her false identity from being exposed, she showers her husband with all kinds of compliments every day. Through their hilarious everyday interactions, the two gradually develop genuine feelings for each other. Xue Yuchen slowly turns over a new leaf and becomes more ambitious, eventually discovering her true identity and the hardships she endured after becoming separated from her family as a child. In the end, Xue Yuchen places third in the imperial examination and, overcoming all obstacles, holds another wedding with her under her real name, Ruan Xi. At last, the two find their happily ever after.