Naomi Armitage (featuring the voice of Juliette Lewis) and Ross Sylibus have changed their names and live with their daughter Yoko as a normal happy family on Mars -- until a robot riot breaks out at an anti-matter plant on Earth. Armitage learns that the riot is a plot to suppress evidence of illegal research and development of "Third Robots." Armitage decides to go to earth alone to find out who is behind this plot, but what she discovers are the most powerful enemies she has yet encountered... replicas of herself.