Groark becomes so angry at his own mistakes that he accidentally damages his best friend's model airplane. This leads to a heated exchange, and the two nearly come to blows. When the fight is interrupted by the school bell, Groark turns to a group of real elementary school children for a lesson in managing anger. He learns how to tell when his anger is getting out of control, how that can lead to fighting, and how to calm his anger. He uses his newfound skill to calm his friend's anger, and the two make up.