Five years ago, while battling an alien force known as the "Mimesis," Dannar pilot Goh Saruwatari first met Anna Aoi. Today, on the day of their wedding, the ceremony is interrupted when the Mimesis strike again. As Goh struggles in his battle against the alien threat, Anna stumbles upon a top secret robot known as the "Neo-Okusaer" and uses it as a last-resort to save her fiance. At that moment, Dannar and Neo-Okusaer merge to become the mighty robot "Godannar.
As Anna begins her rigerous training as a robot pilot, she and Goh also try to adjust to their first days of living together. After a silly argument which has Anna go into town to blow off some steam, the mimetec they fought last week appears, attacking Anna directly.
When a Mimetec appears in the South China Sea, robot teams from several nations gather to battle it. Meanwhile, Anna and Goh vow to battle together through thick and thin.
Shizuru begins to question if she belongs on Dannar base any longer, especially after Goh and Anna are hurt in battle. But after encouragement from Anna, Shizuru's confidence is rejuvinated and she, Anna, and Goh defeat the latest Mimetec threat.
When Astro Base is attacked by a Mimetec, Lou is forced to eject to Earth while her father stays to protect the base. When Lou and Goh return to the base to keep it from crashing in Earth, they end up fighting the Mimetec to avenge Lou's father.
After the fighters crash on an island, Dannar Base begins to send out rescue ships. Go, Anna, Knight, and Ellis inspect the damage to their robots. Okusaer and Dannar can move, but the jetboys are heavily damaged, so the four of them are stuck there.
