A young man Kentaro Saeki (Haruma Miura) keeps failing his bar test and does not know what to do any more. His older sister Keiko is a freelance writer. Kentaro and Keiko begin to search for information on their grandfather Kyuzo Miyabe (Junichi Okada) who dead in the special forces during World War II. Their grandfather Kyuzo Miyabe was terrified of death and obsessed with life. Why did he join the special forces? According to his fellow navy soldiers, Kyuzo Miyabe was a genius and also a coward. Kentaro and Keiko then discovers the shocking truth which has been sealed for 60 years.

In 2199, five years after the Gamilons began an invasion of Earth, the planet has been ravaged by the aliens’ bombs. The remnants of humanity have fled underground to escape the irradiated surface. One day, former pilot Susumu Kodai discovers a capsule sent from the planet Iscandar that tells of a device that can remove the radiation from the Earth’s surface. The Earth Defense Force rebuilds the battleship Yamato with a new type of propulsion system to make the 148,000 light year trip to Iscandar in hopes of saving the Earth. Within one year, the radiation will drive the rest of humanity to extinction.