Yuma has been experiencing some mysterious strain on his body recently. Right then, yet another galactic beast appears! It seems to know Arc's powers well, and chases after Yuma... With nowhere to escape, what will be Yuma's decision!?

And what is the true form of the ominous light in Yuma's chest!?

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?!