Yuma Hize has a strong will to protect everyone. As a rookie investigator of SKIP, the Scientific Kaiju Investigation and Prevention center, he works hard every day on his job to prevent, investigate, and deal with kaiju disasters. Then one day, Shu Ishido from the Global Defense Force shows up… They soon find themselves in danger while going after the kaiju Shagong. That’s when “he” appeared in front of Yuma.

A space kaiju appears in Hoshimoto City; a mysterious giant of light stands on humanity’s side. What is the meaning of his father’s last words…? Yuma now has to confront the recurring nightmare, but with a strong belief in his heart.

A favorite of kids far and wide, the Dinosaur Professor, Shinya Makino has arrived in Hoshimoto City. And it seems he wants to investigate the fossil discovered at the mountain ridge. While Yuma is excited to see his childhood hero in action, Hiroshi seems troubled. As it turns out, the Professor was Hiroshi's teacher! Among all this, a lake suddenly appears at the excavation site...

As SKIP members struggle against the scorching heat, a kaiju appears and and begins absorbing gas. After accidentally absorbing Arc's powers as well, the kaiju loses control, and if it explodes, Hoshimoto City could be wiped out! Yuma is inspired to act by the words of a mysterious woman... But why has this kaiju appeared?

A giant robot suddenly falls from the sky!?

It keeps repeating the same phrase over and over.... Is Givas, the mechanical colossus an enemy or a friend?

Based on Givas' action, Yuma believes it has a will of its own, and decides to confirm it through communication. His actions may convince his team, but will the harsh reality get in the way...?

Chief Hiroshi's daughter is participating in an occupation experience. But instead of SKIP, she chooses to be a news reporter!?

Seeing that, Hiroshi shows his fatherly side, and a certain melancholic feeling fills the air...

Right then, Gomess, the ancient kaiju appears, but what's with that form!? Huh!? Did Gomess just fly!?

The countdown to come to a decision is approaching...

Is parting ways with Arc the price for living in the world he had dreamed of!?

But what you really need is the courage to build your own future, the power of imagination!

What is to come in Ultraman Arc and Yuma's final battle!?