Binky bullies Sue Ellen, who demands that he apologize. When he does not, she challenges him to a fight to settle it. He gets nervous when he finds out she knows Tae Kwon Do, and tries to beat her in music instead. When Sue Ellen is better than him in that as well, Binky accepts that Sue Ellen is tougher than him. For her half-birthday, Prunella's older sister, Rubella, gives her a cootie catcher. Rubella claims that it can tell the future and the answers it gives do come true. Arthur and his friends begin following the advice of the cootie catcher. When the cootie catcher is ruined, they realize that they should not let it control their lives.