To stop the Garogan army's invasion on Earth, the Sakimori family's three children, Hikaru (the oldest son), Hotaru (the teenage sister) and Akira (the youngest son) transform into the superheroes Zone Fighter, Zone Angel, and Zone Junior.
Untuk menghentikan invasi tentara Garogan ke Bumi, ketiga anak keluarga Sakimori, Hikaru (anak tertua), Hotaru (adik perempuan) dan Akira (anak bungsu) berubah menjadi pahlawan tempur Zone Fighter, Zone Angel, dan Zone Junior.