Zhang Chulan, a college student, returned to his hometown in Qingming and encountered a mysterious girl, Feng Baobao, Feng Baobao, who had never met before, was very familiar with Zhang Chulan and took him to the courier company where he worked. In order to help Feng Baobao find her life, and also to find out the secrets of herself and her grandfather, Zhang Chulan's life was completely subverted, and he embarked on a journey of “alien” with Feng Baobao.