The Earth lies darkened and deserted. Despite the best efforts of the film's heroine, Hikaru, the evil-filled castle of Cephiro has taken over the world and stands in the center of a lifeless Tokyo. Before the ice-witch Alcyone can take her revenge on Hikaru, she is rescued by Lantis, a young man who seals her into a magical maze where she is challenged to prove her powers while her friends are hunted down by Cephiro's warlocks. Fleeing through the silent city, Umi and Fuu must seek out the sleeping Mashin; godlike creatures that will fuse with them to form giant warriors of awesome destructive power. But the Magic Knights are afraid, untrained and alone... will even the Mashin be enough to save them from the evil acts of Cephiro?

The cyborgs are no longer on duty, they live normal lives until a mysterious space ship lands on earth. The only survivor on the ship warns about an evil conqueror called Zoa that wants to conquer the universe, which means the cyborgs are back in action...

Outspoken Luise and shy Lotte meet at summer camp and realize they are identical twins who were separated at birth by their divorced parents. The girls become friends and decide to switch places with each other so that they can each learn about the parent they never knew, and perhaps bring together their broken family.

Apulo (a cat-like space alien with the ability to lock a human's emotions) and Latell work for the Division of Space Piracy (or DSP for short). The two of them are extremely destructive in their solving of DSP cases. They are attempting to stop Youmei the space pirate from exploiting Computer Aided Thinking for his own nefarious plans.