Perhaps in the past, or perhaps in the future, humans have colonized the universe on a large scale. When the population expanded to 500 billion, humans scattered in all corners of the universe returned to their homeland, but triggered a homecoming war with heavy casualties. In order to protect the holy land of the Earth, humans formulated the Gaia Sanction, agreeing not to allow anyone to touch it. However, Harlock (voiced by Shun Oguri), who was once the captain of the United Fleet, betrayed the Gaia Sanction, drove his Arcadia and raised the flag of rebellion, becoming a wanted criminal who had escaped for a hundred years. Isola (voiced by Tomoyuki Morikawa), the commander of the United Fleet, instructed his younger brother Yama (voiced by Haruma Miura) to mix into Arcadia to explore the secret of the perpetual motion machine invented by the Nibelungen people. During this period, Harlock led the crew to approach the earth, and the United Fleet laid a dragnet in the solar system to stop him. The distant homeland and the long-lost truth shocked everyone... This film is adapted from the classic science fiction manga by Leiji Matsumoto.