Test by test Yang gets the "I Smoke you" dance from Yin. When he finally gets sick of it, he decides to use the Smartness to make Yin feel what he has been feeling all the time. Yang finally decides he likes being smart, even if it makes him a jerk. Will Yang be able to put aside his ego and cooperate with Yin to stop Carl The Evil Cockroach Wizard's evil plan?
Yang is tired of getting the "I Smoke You" dance from Yin. So he uses the Glasses of Ultimate Smartness to cheat on the next Woo Foo quiz. He passes the quiz and gives Yin a taste of her own medicine. Meanwhile Carl finds out that Yang is smart and decides to make Yang write down a potion to make himself huge so that he can blot out the sun. Yang like a being smart and becomes a jerk. He spoils the end of a movie and tells Dave what's in all his presents. Carl gets the potion and grows huge. Yin has had enough of Yang being a jerk and orders him to take the glasses off. Yang refuses so Yin turns then into girl glasses which Yang breaks. He apologizes to Yin and together they stop Carl.
The episode ends with Edna getting the glasses and insulting Carl which makes him upset.
- This episode features Carl as the main antagonist.
- The movie Yin and Yang are seeing in this episode, is an allusion of the Swedish film The Seventh Seal.