The 2010s, Mexico. Luca, who admired his grandfather—a veteran Hero—enrolled in a military academy aiming to become a soldier, but he was ordered to raise a Golden Eagle. Though Luca was in despair, he gradually deepened his interaction with the Golden Eagle, Sol. Their usefulness in Drone countermeasures was recognized, and Luca and Sol were selected for the grand stage of the Independence Day Parade, but...?