在这部下町火箭剧情片中,《下町火箭》的主人公名为佃航平。在放弃宇宙工程研究后，他回到东京大田老家经营祖业农制造，却不幸濒临破产危机。尽管如此，他拒绝了大企业提出的以20亿收购其专利技术的提议，自发提供火箭发动机，向世人们展示了包揽日本务农业的街道工厂的强大力量。
Tsukuda Kohei (Mikami Hiroshi) was once in charge of the development of a space rocket. He had resigned from the Agency of Space and Astronautical Science to take responsibility for the failure of the rocket launch and now runs Tsukuda Manufacturing, a small factory in the old downtown district. Meanwhile, Teikoku Heavy Industries announces a project to launch a domestically-made rocket at a press conference. While the project is proceeding smoothly, the project manager Zaizen Michio (Watabe Atsuro), head of the Aerospace Division, receives a shocking report. The patent for the proprietary engine component technology that Teikoku Heavy Industries had gone all out to develop, has already been filed by Tsukuda Manufacturing. The rocket cannot fly without that component so a beleaguered Zaizen offers Tsukuda 2 billion yen for the transfer of that patent. But - .
