More than a hundred years after the battle of Ultraman Taiga ended, humans and cosmic beings have established comprehensive interactions and become a part of the universe, but new crises have also followed. In order to deal with the attacks of the universe and the daily affairs of the people in the universe, humans established the Interstellar Special Operations Team ISTF. However, no monsters have appeared for many years, and humans began to relax. A week ago, the monsters suddenly appeared and wiped out the ISTF easily. The new ISTF quickly assembled and continued to compete with the monsters, but was still unable to compete with the monsters. Just when it was forced to a dead end, the Ultraman from twenty years ago came to earth. His name was Ultraman Star.
