Ryohei Tsukuda is a former researcher at the Japan Aerospace Exploration Agency. He now runs a factory that his father left behind.
Ryohei takes part in the domestic rocket development plan Stardust, run by a large Japanese corporation. One day, Ryohei suddenly hears that the CEO of that company will be replaced and the Stardust plan will be shut down.
Naohiro’s is an employee at Ryohei's factory. His father has fallen ill and every weekend Naohiro goes to his father's farm to take care of him and the farm. Ryohei and Mitsuhiko visit Naohiro. There, Ryohei sees Naohiro driving a tractor, and is inspired by a new dream!