Cai-Sheng is a young celestial fox demon being raised by a bevy of wild fox demons, who hope she will master the celestial ability to transform into a male and save them from extinction. One day, she sneaks out to the nearby village, where she befriends a little boy and girl. When they save Cai-Sheng from a dog attack, her caretaker marks them with special symbols that will not disappear until Cai-Sheng repays her debt to them. 200 years later, Cai-Sheng meets the reincarnated boy and girl, and decides to repay her debt to them by trying to match-make the pair. But things get complicated when the reincarnated girl falls in love with Cai-Sheng's male form!