Emi Kaidou, a high school girl who lives in Shibuya, lives a wealthy but lonely life alone in a mansion in an upscale residential area. One day, at the intersection in front of the station, a mysterious light suddenly appeared in the sky and penetrated her body. And a mountain of rubble falling from the sky beyond space and time, and a group of unidentified combat robots. Three heroes from another world, Gatchaman, Polymer, and Tekkaman, saved her from her confusion.