裘荣芳是上海地铁维保公务分公司的作业队队长，他带领班组对轨道进行探伤、修复。务实创新、攻坚克难、日复一日、年复一年守护着地铁线路的安全。超一千万人次会在日常工作日选择地铁出行，而裘工在末班车停运后和首班车运营前，抓紧抢修，为次日所有乘客的出行提供了安全保障。该片旨在深入展示钢轨背后为众人守护安全、节约时间的匠人。

The film tells about Qiu Rongfang (50 years old), he is the Technical Director of Shanghai Rail Transit Maintenance Support Co.,Ltd. who lead the team to do routine inspection the tracks and maintenance with heavy equipments. As a leader of team, Qiu Rongfang is always preserving teamwork and solidarity because the high mobility of Shanghai metro. Over 10 million people use the system on an average workday, he is working in the midnight after the last metro to ensure the safety and keep those good running for the future. The film statement is the deeply struggling of maintainers could save moment of peoples.