Three years after the war between humans and demons, the two major demon-slaying families got married. The demon king's daughter Shi Shi (played by Yang Jiezi) forgot her true identity and memory, and turned into a cute and cute girl who was ignorant of the world and repaid the Xuanyuan family for saving her life.Due to the kindness of the Mo family, she pretended to be Xuanyuan Yu, the eldest daughter of the Xuanyuan family, and married into the Mo family, and started a romantic love story with Mo Yan (played by Sun Chenjun), the eldest young master of the Mo family, in which marriage comes first and love comes later.