Based on a story by the legendary manga creator Leiji Matsumoto, known for works like “The Cockpit” and “Queen Emeraldas,” this 55-minute featurette continues the narrative one year after the events of “Galaxy Express 999.” It follows the journey of a young boy named Tetsuro and his nurturing companion Matel as they strive to liberate the universe from the clutches of the Mechanized Empire, which has seized control of Earth.