A little fox demon has come to the mortal world to repay a debt. She takes the place of the bride in marrying the cold general Gu Yu Fan. Their relationship which starts from marriage turns into love.

Gu Yun Fan is hailed as the god of war of Tiansheng Kingdom. He sustained injuries after leading an army to defeat invaders from Beirong. In order to ensure that the Gu family bloodline will continue, the emperor orders an arranged marriage. To repay her benefactor, little fox demon Xia Jiu'er marries into the Gu family. After many twists and turns, Gu Yun Fan and Xia Jiu'er reveal their sincere affection for each other. Can they break through the boundaries between humans and demons to be together?