Fred becomes obsessed with a Chinese puzzle Madam Butterfly gave him. Since he plays that game all night long, Anemone Worrynaut, the school psychologist, mistakes Fred's behavior with the symptoms of depression. Since Fred looks more blasé than ever, she is afraid that his attitude will have repercussions on all of his classmates. So Anemone decides to turn the school into a nice, happy environment. Pink walls, whales sounds. To worsen things, Worrynaut tells the entire school that it's Fred's fault. With everyone (even his mother) against him, Fred must find a way to return the school to normal by convincing Anemone. Meanwhile, Balthazar, the armless science teacher, loses his pet monkey Claude (whom plays the role of his arms since he lacks his own). No longer able to perform his daily routine, Balthazar becomes more and more depressed but no one seems to care, especially the school psychologist.