A mysterious typhoon seems to be caused by something other than the weather, and it's up to XIG to prevent the unnatural disaster from wreaking too much havoc.
Gamu Takayama is a 20 year old member of an organization called Alchemy Star. After a monster known as C.O.V attacked the Earth, Gamu falls through a portal of light and meets the giant: Ultraman Gaia, who gives him his powers.
Hiroya steals data on monster locations throughout the world and then uses Agul's power to rouse them, leading to a desperate battle between Gaia and Zonnel.
Hiroya's frustrations with humanity reach an apex as he enacts a plan to end what he sees as their futile hopes by destroying the Aerial Base. Gamu is the only one who can stop him.
Fujimiya awakens a monster, Zonnel, with the intention of stopping an asteroid headed towards the Earth. While Fujimiya might want to preserve the planet, Gamu fears that he's not as concerned about saving human lives.
