Austral Island is located 2,000 km south from Samoa islands. The existence of the island was removed from the official records, and Tagami Yu made a journey to search for the reason. 
He sailed for the island with Dr. Waive who was his father's friend, Doris who is the daughter of Dr. Waive, and Captain who is the friend of Dr. Waive. On their way to the island, GAIL, the international conglomerate, and gangster, Cougar Connection lead by Lady Lynx attacked them. 
They managed to arrive at the island, but suddenly a mysterious monster began to attack them. When they became ready for death, a blue giant robot appeared. It destroyed the monster and saved them. Although it was an existence far beyond human knowledge, it reminded Yu of something warm and familiar. 
It was Giant Gorg which is called "Messenger of the God" by the inhabitants of the island. Escaping from the attack of GAIL's assault team, Gorg guided Yu into the underworld. There, he found alien's relic and an alien who woke up after 30,000 years' sleep. 
(Source: AnimeNfo)

Episode 1 - New York Suspense

Episode 2 - Westward Bound

Episode 3 - Stormy Departure

Episode 4 - Encounter

Episode 5 - The Island of the God

Episode 6 - Gorg's Secret

Episode 7 - The Fortress at Magma Hill

Episode 8 - GAIL's Mineshaft

Episode 9 - Into the Darkness

Episode 10 - Dark Bay

Episode 11 - Towards the Light

Episode 12 - Green Mat

Episode 13 - Lady Lynx

Episode 14 - Separate Ways

Episode 15 - Journey's End

Episode 16 - The Gates of Time

Episode 17 - Trigger

Episode 18 - Slumbering in the Labyrinth

Episode 19 - Escape, And Then...

Episode 20 - The Captive Giant

Episode 21 - Town Panic

Episode 22 - Footfalls of Retaliation

Episode 23 - The Austral Eradication Protocol

Episode 24 - To the Mountain of Fire Once More

Episode 25 - Distant Bonds

Episode 26 - The Shimmering Island

Sunrise

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