The Onioneers are on winter camp, and Lemony is hoping to win all of the merit medals. But she and Mr. Highpants get stuck on top of Mt. Onion. Now Yakkity, Keo and Wanda must save them.

Yakkity is embarassed by a new hat that Granny made for him but eventually the hat becomes a popular fashion trend and Yakkity is credited as the creator. When the hat frenzy dies down Yakkity partners up with Keo and Mr. Highpants so that they can come up with the next fashion trend that will make them rich.

Mr Highpants must attend a Confectionery Convention. He asks Yakkity and Keo to look after his hi-tech home, warning the boys not to touch any buttons ... and only to feed Mr Littlepants "Chimp-Chow".