The Hiden Zero-One Driver can only be used by the company's president. Whose will was the one that led to the creation of the this device and it falling in the hands of Aruto Hiden? Zero-One's birth story will be revealed! Kamen Rider Zi-O, who fought as the greatest Demon King of Heisei Kamen Riders chose to reset the world and live a new life. Why does Sougo Tokiwa transform into a Kamen Rider again and meet Zero One? Kamen Rider Zi-O's true ending chosen by Sougo will be revealed! The world of Kamen Rider Zero-One and the world of Kamen Rider Zi-O. The two heroes live in different worlds, but what is waiting for them after crossing time and space into a single world? Union or conflict? This winter marks a new legend in the history of Kamen Rider.