Ramon loses confidence in his ability to draw, but his sister gives him a new perspective on things.

The Herdmans plus Halloween have always spelled disaster. Every year, these six kids, the worst in the history of Woodrow Wilson School and possibly even the world, wreak havoc on the whole town. They steal candy, spray-paint kids, and take anything that's not nailed down. Now the mayor has had it. He's decided to cancel Halloween. There won't be any Herdmans to contend with this year, but there won't be any candy, either. And what's Halloween without...

Magically transported to southwest China to find the final object needed to break the spell on the wizard Merlin's beloved penguin, Jack and Annie take a side trip to the world's largest giant panda reserve.