Enmargo was an ancient demon that was buried deep inside a mountain for centuries until a construction crew began waking the giant creature from its hibernation with their explosives, causing an earthquake.

When ZAT came to investigate the quake, the owners of the land refused to stop construction, despite the possibility of a giant monster. After ZAT left, blasting continued, dislodging a statue of an ancient deity from the mountain that was keeping the demon warrior buried, which began sending psychic signals to children that had found it earlier to return it to the mountain. However, soon enough, the massive Enmargo fully awakened from its hibernation and went on a rampage throughout the construction site. ZAT received word and began their attack on the ancient sword-wielding monster. However, the group's weapons were powerless against the ancient demon's power.