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?
This OVA was created as a stand alone adventure, so if you're looking for a manga based movie then forget it. The only things that are the same are names of people and locations. The biggest difference in this movie is character relations. People who are friends or would become friends in the manga and TV series are enimies all the way through the movie. I personally like the movie because it gives a fresh perspective on a proven title, but don't go watching this movie expecting certain people to be the same as in the manga and TV series or you'll dissapoint yourself.