Three years have passed since the series concluded. Ryo is employed at NASA as an engineer working on a major rocket project. Anise, his fellow Borgman and romantic partner, has been reduced to flipping burgers at a restaurant. So when she receives a letter offering her a professional position in a large, high-tech Japanese project, she eagerly accepts. Ryo, however, remains as indecisive as ever, so she leaves for Japan without him.
Chuck Sweager, the third Borgman, works as a police officer, as does his girlfriend Miki. After Miki witnesses a fight among several cyborgs, she informs Chuck, who flatly states that it cannot be possible since the only living cyborgs are Ryo, Anise, and himself. But she persuades him, and they begin investigating. Anise arrives for her new job, and when they meet for dinner, they explain the situation to her. Anise volunteers to sneak into the Heaven's Gate project, which they suspect is the source of these new cyborgs. Meanwhile, Ryo is en route to Japan to pursue his girlfriend. Accompanying him is Hussan, one of the two surviving researchers from the Borgman Project, who has been summoned to testify before the Tokyo Police to assist in the investigation. Once the entire cast gathers in Japan, matters start to grow complicated.