During the Tang Dynasty, Crown Prince Li Xinghe went out of the palace in disguise, and met the coroner, Zhang Xiaomeng, and the official of Court of Judicial Review, Chu Qi. After the three of them have solved the mysterious Gu Case, they encountered the Red-Clothes Murder Case. In the midst of that, they even encountered Fox Spirit Locked Room Murder Case. How are they going to solve all the Mysterious Tales in Chang'an?...

Chai Xiaoqi, who was an alien girl from the "Cape Town Planet", lost her signal and had to stayed on earth. She encountered an overbearing boss named Fang Leng who was suffering from the "rainy weather heterosexual amnesia", and he would forget the females around him. A hilarious and romantic cross-star love story since then started. Chai Xiaoqi was not only an alien, but also a true-handed witch. Once she inhaled the hormone emitted by males on the earth, she would fall into "flowery state" and met many funny things after that. In order to survive on the human earth, Chai Xiaoqi used her various super powers to solve one accident after another....