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.