When he was a child, Lin Chen, who was obsessed with Ultraman, was told a lie by his father on the exploration team that changed his life. His father lied that he was a cub of light from the M78 nebula that wandered to the earth. He gave him a handmade divine light rod and told him to work hard to become stronger and resist the giant beasts that would appear in the world in the future.
With faith in mind, Lin Chen gathered a group of teenagers to form the Ultra Gang. To join the gang, you need to memorize all the Ultra Monster Illustrated Books and swear to only protect the weak. The brothers each have special names. The brave Wang Hu, the thoughtful Zhao Lei, the planner Chen Yu, and the Su Wan who is responsible for treating the wounded walk side by side. The gang has gradually expanded from a campus anti-bullying squad to the largest underground force in the country, sticking to the bottom line to protect the people at the bottom.
Strange phenomena appear one after another in various places, giant beasts emerge from the ground, and the dark age suddenly comes. Guns and artillery were unable to harm the monster, so Lin Chen led 80,000 brothers to the battlefield. Everyone was martyred one after another, leaving Lin Chen alone in the huge Ultra Gang.
The broken Ultra badges all over the ground shattered his years of faith. When he collapsed, the broken blue pendant unlocked the ancient truth. There is no M78 Nebula in the world, but the belief in its protection is true.
Carrying the legacy of all his brothers, Lin Chen went to Kunlun alone to find the real power of light. What secrets does the father who has been missing for many years hide? What kind of unsolvable catastrophe is hidden in the dark source of ten thousand years of reincarnation?