The story tells that Ultraman Zeta, a new member of the Space Guard, became an apprentice of the Cyro Alts in order to become a warrior protecting the earth. It is said by the master that it is only one-third of half-strength, and later, under the constant fighting and the teaching of other Ultraman, it becomes a story of a space warrior who can defend peace
The protagonist Ultraman Zeta is a newcomer to the Space Guard, and his strength is not outstanding among the many Ultramans . His idol is Ultraman Zero. In order to make himself stronger, he began to learn from Zero. At first, Sai Luo's evaluation of his apprentice was that he was not even half a hero. But in his heart, he recognized his potential very much. Ultraman Zeta possessed unremitting energy. At first, he made many mistakes on the earth because he was not familiar with the earth's culture. However, he has an extremely strong sense of justice and a passion to protect world peace. Later, Ultraman Zeta and the human body Natsukawa Haruki cooperated to carry out the mission of protecting the earth on the earth.