When new foes Nahane and Ohanefu, accompanied by mysterious Giant Monstrous Beings, invade from space, Earth faces a grave threat. The Ultra Evolution Institute's Shinkalion ALFA-X holds the key to this crisis. For Hayato and Team Shinkalion, peaceful days are shattered as they gear up for battle once more. Hayato grapples with worry when his father Hokuto vanishes in an enemy onslaught. Amidst the chaos, a 9-year-old Hokuto emerges from a different time and place, driven by fate and Glowing Particles. With a resolve to pilot Shinkalion ALFA-X, armed with cutting-edge technology, to safeguard the Earth, the young Hokuto joins forces with Team Shinkalion. United in purpose, members from various branches across Japan—Hokkaido, Yamagata, Ōmiya, Nagoya, Kyoto, and Moji—confront the most formidable cosmic adversary. Will Team Shinkalion defend Japan's peace and security? And can Hayato and Hokuto's bond withstand this turbulent test of time?