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 construction site is razing a forest and comes across a relic thought to be an ancient ruin. As Hayato, the site manager’s son, anxiously warns Yuma that the construction is in danger, the legend of the forest unfolds. Now it’s Yuma’s time to respond to Hayato’s feelings.

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.

Once again something strange is detected while monitoring the Monohorn! As Yuma and Shu head down to investigate, they hear mysterious words and then followed by a sudden attack!? Creeping in the shadow is a mysterious pursuer from space... Then, Arc appears in front of Yuma and tells him the truth of 16 years ago. The danger Earth is facing will soon become clear...!

Alongside a thundering sound, the ground parts and a seal appears...

Coming face-to-face with the possible destruction of not just Hoshimoto City, but the Earth itself, Shu explains to the group about the harsh reality.

The enemy's scheme leaves Yuma hopeless and unable to transform into Ultraman Arc. Yet, believing in Arc's words, he further unleashes his imagination!

Ultraman Arc vanished within the massive explosion after a fierce battle with Trigelos...

But when Yuma wakes up to darkness, Arc appears! And he reveals a shocking new truth to Yuma!

The days at SKIP, kaiju battles, and meeting Arc... Can it be that the past 16 years have been nothing but a dream?!

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!?