In the military factory of "Blue, White, Green and Orange Mountains", the peaceful lives of Guo Yaqin and Yang Shuhui were broken by an accident, and they were transported to the battlefield of the Anti-Japanese War. They struggled to survive in the rain of bullets, thinking that their fate would be changed. However, the mysterious power came again and sent them back to 1977. They transformed into college students and returned to the familiar military factory. At this time, the military factory is in a critical period of development of the second generation. They join hands with the second generation of young people to shine in production and construction, interpret the spirit of endless life and struggle with their blood, and continue to write the legend of the military factory.
