When Yin, Yang, Lina, and Melodia think that a certain TV show is more important than anything else that's going on, The Lesson puts them inside it! Faced with stereotypical superhero challenges, "Yangst" (Yang), "Yin-secure" (Yin), "Sass-quatch" (Lina), "Stenchfire" (Melodia), and "Fifth Wheel" (Dave, who doesn't watch the show) must face "Generi-tron" (Zarnot), who actually poses a threat in this alternate universe! Will they be able to conquer their faults and learn their lesson?