A massive monster with huge horns has suddenly appeared. That monster is Deathdrago, the first monster that appeared before humanity six years ago. Faced with Deathdrago's return, Akito seems to have gone a little strange. What connection could there be between Akito and the monster that begins it all!? And will Kengo be able to make Akito smile!?

Suddenly, a unidentified robot fell from the sky! Following that event, visitors appear one by one. An eccentric alien with a bird on his shoulder. A defense force member that's not GUTS-Select. And finally... another Ultraman!? A new battle for Trigger and GUTS-Select now begins!