A giant monster Tetsudon is attacking a peaceful town. To protect civilians, the Self-Defense Force is deploying an ultimate weapon - a giant female-shaped combat robot 701. Sayuri, who is piloting a robot, deals with the monster, but in the ruins of an accidentally destroyed love hotel she notices her boyfriend, who is cheating on her with another woman.
A solar flare has awakened Spark Dolls from the depths of the earth and the ocean! Fifteen years later, Daichi Ozora transforms into Ultraman X to battle threats from both aliens and monsters. He is also a member of Xio, a team created to battle the monstrous threats.