Seventeen-year-old Cheng Miaomiao (played by Sun Qian) and sixteen-year-old Cheng Yaya were born at Oil Production Plant No. 1 of Linqi Oilfield. Three generations of their family have worked in the oilfield. Their father, Cheng Pengfei (played by Tian Yu), is an ear, nose, and throat doctor, while their mother, Jia Daiyu (played by Liu Lin), handles logistics for a fleet. The whole family moves from the northwest to the coastal base town of Heping.
