Luna leaves to deliver weapon plans to Admiral Rudolph, the leader of the human forces. Her helicopter is shot down and crashes, and the pilot sacrifices himself to allow Luna to escape a robot scout team. Luna is able to meet with Casshan and Friender, and finds that Casshan is struggling with his lack of humanity while also suffering physical weakness from the battles. The three are attacked by a robot army and Casshan tells Luna to flee but she is unable to leave Casshan.
Far in the future, ecological disaster on Earth led humans to create a race of androids called Neoroids to clean up the mess but they promptly turned on their human masters and enslaved them. Enter a lone fighter named Casshan with a mission to free humanity ... and restore his family's honor.
