Smogg is a concrete jungle devoid of plants and animals. The city's inhabitants live a mundane life and have never even ventured outside of the city walls. However, when Calvin Callioni and his Most Splendidly Spectacular Circus of Starzborough come to visit, Smogg's citizens soon discover that their leader has been suppressing them. They begin to question what lies beyond the city gates and start to rebel, spurred on by the larger-than-life ringmaster and his merry troupe of circus performers and animals. Will the citizens finally wake from their reverie after all these years?