According to local legend, Jupiter-City has a hero – a mysterious figure with a cape made of stars known as Jupiter-Man. He's a defender of the helpless, a fighter of crime, and now, a missing person. Enter twins Quintin and Jackie, who suddenly find themselves taking over the hero's true duties: fighting monsters, stopping magical disasters, and taking down super villains!? Will the twins survive long enough to find Jupiter-Man, or will they crumble under the weight of their new responsibilities!?