After Bok Choy demonstrates his class how to capture villains, he ask a student for a special assignment once class is over. Eager to help, Larry-Boy decides to do it, only to find out that he has to clean out chalk erasers. Classmates Lemon Twist and Electro-Melon offered the plunger hero that he can come to the amusement park with them after he's done with the chores.