There are metal cadbots on Earth that are living by transforming them into beacles, hiding stagnation. The protagonist Jun accidentally gets Metabres in his hand, and gets caught up in numerous events with Bluecap... Can Lee Yeon-jun seal the metal cardbots scattered on Earth?
Seven years have passed since Ultraman Trigger protected the world from various threats. In the present, Kanata Asumi, who is a positive young man, peacefully lives together with his grandpa. One day, while delivering ordered food, he witnessed a catastrophe: Spheres from the outer space attack Earth and Mars. Motivated by saving the precious lives of the people, he merges with Ultraman Decker and joins GUTS-Select, in order to protect what's important.