Set two years after the events of Ultraman Trigger, an ultra-ancient threat re-emerges, leading to the return of Ultraman Trigger and Ultraman Zett to save the day, but all is not as it seems.

Giant kaiju roam. A sinister conspiracy consolidates power. And there's nobody left to stop it – because Ultraman is GONE! How did the situation go so wrong…? And how can the United Science Patrol ...