Yuan Che, an ordinary young man living an ordinary solitary life, had his life trajectory completely changed the day a giant monster appeared in the city. In the chaos of escaping, he unexpectedly gained the ability to transform into "Ultraman Geed". However, what this power brought was not glory, but a truth that made him fall into the ice cave - he was actually the "son" of the notorious dark Ultraman Belial. With the ferocious monsters destroying the city on one side and the dark bloodline he was born with on the other, Yuan Che struggled in confusion and pain. Will he succumb to fate and become the new ruler of darkness, or can he resist the constraints of genes and find his own path of light? The battle horn has sounded, and the fateful battle begins now.