Gus McFlatulence-Davis is a rich kid who thinks he has everything. When he isn't buying and selling drugs to small, furry mammals, he's playing the zither as the token human in an all-platypus polka band, named "Gus and the All-platypus Polka Band".

Fate hits him with a cold crème-brulée-in-the-crotch when he falls into a trans-dimensional rift inside a Starbucks men's room. He wakes up in the Trellian Valley--formerly home of Narwin, the Golden Rhinosceros. As you'll remember from the prequel, Narwin was crushed by the Standing Stones of Aelia. The spirit of Pip, the exploded pelican, has returned to send Gus on a journey to find the Lever of Archimedes, with which Pip plans to lift the standing stones off Narwin.

After a wacky adventure involving a shipment of illegal anchovies stored in a balloon in Gus' nether regions, Gus returns with the Lever of Archimedes, but in a tragic miscalculation, they accidentally move the world out of its orbit and they all die a fiery death as they crash into the sun. In a final twist of irony, it turns out that Narwin had faked his own death and has been working at the Starbucks, safely on the other side of the dimensional rift the entire time!