17-year-old Cheng Miaomiao and 16-year-old Cheng Yaya were born in the No. 1 Oil Production Plant of Linqi Oilfield. Three generations of their family are oilfield workers. Their father Cheng Pengfei is an otolaryngologist and their mother Jia Daiyu is a team logistics worker. The whole family moved from the northwest to the seaside base Heping Town. In the late 1990s, Miaomiao, with a yearning for the outside world, took her childhood sweetheart Li Si and her best friend Hu Qiumin to use the summer vacation of her first year in high school to start an adventure of "going to Hong Kong to welcome the return", but it was a failure. On the other hand, the 16-year-old brother Cheng Yaya went to the back mountain for archaeology and was almost mistaken for a tomb robber. Mother Jia Daiyu was very troubled, and the siblings also started a chicken...