You're watching a 1986 space opera that refuses the obvious choice: the son of a disgraced captain hunting for proof his father wasn't a coward, caught between a government that branded him a traitor and a moving planet that might not be an enemy at all. The show believes in co-existence in an era of anime that thrived on total war. By the time you understand what Dr. Sugita actually chose, you're no longer watching a revenge story, you're watching a son inherit his father's impossible faith.

In 2119, the spaceship Green Sleeves finds three planets that have been attacked by X23, a moving planet on course for Earth. Its captain, Dr. Sugita, refuses the Earth government's order to attack because he believes the two sides can coexist, and then all contact with the ship is lost. Two years later, strangers bring his son Susumu to Dr. Miya, one of the few people who still stands by Sugita while most call him a traitor. Dr. Miya urges Susumu to join White Pegasus, a team of special medical rescuers. Their Micronizer System shrinks people so they can heal patients from inside the body. When X23 finally comes into view, its aliens, the Hues, make one of Susumu's friends their first target. Susumu and the team fight a Hue inside the friend's body. Susumu then realizes that signals from chips within the Hues carry music he and his mother wrote as a gift for his father. The show is a science fiction action series.