Mechanical engineering graduate Chen Mo repeatedly hits walls in his job search, weighed down by heavy life pressures. By chance, he gets a job at an auto repair shop, steadily mastering repair techniques. Combining his university minor in computer science, he develops a free car troubleshooting mini-program, helping car owners avoid repair traps. Facing suppression and enticements from a competing company, Chen Mo stays true to his heart, refusing high-priced acquisitions and insisting on keeping basic features free. He leads his team to deeply cultivate real repair data, open-source industry materials, and return to his hometown to open a public welfare training center supporting disadvantaged youth, stepping up from a grassroots mechanic apprentice into a tech entrepreneur with sentiment.