"Do you have... what it takes to be a hero?" It all starts when a mysterious space sage asks Yuma Hize this question. The mysterious man entrusts Yuma with challenges that surpass the limits of his imagination with a stake too high... "Should you fail... then you... will lose your power as Arc." Protecting Hoshimoto City alongside the SKIP's members, the bonds of trust created between the members, the conflicting feelings arising from trying to understand the meaning of defeating kaiju... Earning the powers of Ultraman placed the weight of these responsibilities upon Yuma. Now, these very burdens are twisted by Sascal, who manipulates them, sending challenge after challenge toward Yuma. Battling 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 he...will Ultraman Arc overcome the greatest challenge yet and protect the future, surpassing the limits of the power of imagination?

Ikuto and Ryoma meet in juvenile detention and become best friends, they pursue their dream of participating in the martial arts event Breaking Down. However, rivalries soon turn their dreams into unexpected conflicts.