When Chett almost gets struck by a bolt of lightning, Lisa makes Chett invincible to save him. Now, nothing can harm Chett, not even the fact that he was electocuted, run-over, and shot. Gary and Wyatt get Chett to use his powers for good, so Chett becomes the super hero, the Star-Spangled Butt Kicker. Chett works at helping to put a stop to crime. However, trouble occurs when his powers wear off while he's trying to stop some homicidal maniacs.

Pour le sauver d'un orage, Lisa est obligée de rendre Chett invincible. Maintenant plus rien ne peut lui résister. Gary et Wyatt le font utiliser ses pouvoirs pour sauver la planète et il devient un super héros. Mais les problèmes commencent quand ses pouvoirs diminuent alors qu'il poursuit des criminels.