Ultraman Z has arrived on planet Ialim. There, he looks back fondly at the achievements of his mentor, Ultraman Zero. But then, a new sphere of light appears. What is it, and why has it appeared in front of him?

Z wants to expand his understanding about the other Ultra Heroes, so Ediom presents him with Ultraman X's data. Ultraman X and Zero have a tight bond and have fought together. What will Z learn from their teamwork?