After the war god general Gu Yunfan of Tiansheng Kingdom defeated the invasion of Beirong, he was seriously injured and dying. The emperor wanted to continue the Gu family's incense and ordered a marriage. In order to save the life of her benefactor, the little fox demon Xia Jiuer managed to marry into the Gu family. The two got married first and then fell in love. After many twists and turns, they revealed their true feelings to each other and finally broke through the boundary between humans and demons and made a promise to be together forever.