Ouyang Xialan, played by Zhang Li, is a trade investigator. In the process of carrying out a mission, her work leads her to Peng Yue, played by Gao Hanyu, the second son of the Tianguan Group, who is also the founder of automobile research and development institution "Upon The Mountain". After several twists and turns, two of them finally came together after overcoming many difficulties, and brought the world to see China's achievements in automobile.