It is the year 1969 and alien armies are trying to invade Earth. The organization AEGIS has two main objectives in dealing with the aliens: protect Earth from their forces and keep their presence a secret. When Ukiya Shun is on his way to high school one day, he witnesses a girl battling with a group of aliens. This civilian seeing alien activity would normally be a big problem for AEGIS, but, much to Ukiya's surprise, he is able to harness elemental powers to fight the aliens just like the girl is. Now his high-school life is a thing of the past and he is helping fight the greatest battle that humankind never knew about. ~ Cammila Albertson, All Movie Guide