In a high-tech city that resembles modern technology yet seems slightly different, there is a regular event that captures the attention of all local residents—the "Human Cannonball Competition." Contestants compete against each other within the towering circular city to achieve their highest glory. On the other side of this brilliance, there is a mischievous little mechanic named Zazel, responsible for maintenance. Driven by a momentary longing, she puts on a competitor's suit left aside and is unexpectedly mistaken by her boss for a contestant, plunging headfirst into the fierce competition! Without any flight devices or safety gear, can Zazel "safely" reach the finish line?