In the Circus Minimus everything is backwards. The Big Top performers believe that the show must go on, but with the LEAST amount of effort possible. A high energy performance is bad entertainment. The starring acts of this circus include "The World's Most Boring Clown", "The World's Loudest Mime" and Circus Minimus once boasted "The World's Worst Lion Tamer", but he only played one performance. 

 

Offstage, rudeness is rewarded by the ringleader, and the K-Word (Kindness) is prohibited. But the Side Show performers follow a different set of rules. That's why they have been quarantined - so they can't infect the Big Tops with their kindness. But, when the Side Shows escape their quarantine and do a few innocent good deeds, some of the Big Tops must go to see Dr. Dibdin to explain their symptoms (incuding feeling "lighter than a feather" and "having trouble frowning") and to ask "Am I dying?"

 

The Doctor diagnoses the Big Tops with happiness, and they must decide if they will embrace their diagnosis and confront the ringleader or try to go back to the ways things were before they were infected with kindness.