The play tells the story of the rabbit fairy Bai Zaizai, who, in order to avenge the murder of her master, hunted down her fellow apprentice Bai Yuyu, and repeatedly rescued the second prince Liu Changge from Bai Yuyu. Liu Changge fell in love with her at first sight and hired her as his bodyguard. The second prince Liu Changge, the eldest prince Liu Changhe, and the third prince Liu Changjie were caught in a struggle for the throne. The national teacher Shen Yi designed to let the three princes kill each other but failed, so he controlled Liu Changhe and Liu Changjie. Bai Zaizai helped Liu Changge and finally subdued Shen Yi, restored peace to the world, and became a generation of princesses. The heroine Bai Zaizai (played by Yang Fuyu) in the play is a little demon transformed from a white rabbit by the magician Su Molun using the spiritual power of meteorites from outer space. She is eloquent, naughty and willful, dragging and cute, greedy and fun. In order to avenge the murder of her master, the heroine is willing to be Liu Changge's bodyguard and investigate Bai Yuyu's whereabouts. As she spends a long time with the male protagonist Liu Changge, the two fall in love with each other. The male protagonist Liu Changge (played by Yu Feifan) is a hybrid of a human and a demon. He is the most powerful and strongest prince. He has been hurt in love. He seems to be dark, cold and overbearing, but he is actually warm-hearted. Later, he was attracted to the female protagonist Bai Zaizai, and always protected her secretly and accompanied her to eat all kinds of radishes. The two experienced the danger of being murdered by the national teacher Shen Yi, and finally fell in love and stayed together for life!