"Do you have what it takes to be a hero?"It all starts when a mysterious space sage asks Yuma Hize this question. A mysterious man entrusts Yuma with challenges that surpass the limits of his imagination with a stake too high... "Should you fail... you will lose your power as Arc."Protecting Hoshimoto City alongside the SKIP's members, the bonds of trust created between the members and the contradictory feelings arising from trying to understand the meaning of defeating kaiju... Earning the power of Ultraman placed the weight of these responsibilities upon Yuma. Now, these very burdens are twisted by "Sascal", who manipulates them by sending challenge after challenge toward Yuma.When battling with giant kaiju, an evil alien bent on destruction and a warped dimension where even time itself is distorted, Yuma must confront the ultimate test. Will Arc overcome the greatest challenge yet and protect the future, surpassing the limits of the power of imagination?