The Superchums rehearse their welcome for the arrival of the superhero Mr. Good. Meanwhile in the Janitorium, Mr. Bad reveals that Mr. Good is his twin and resolves to avoid his visit by pushing Crumptonville into the sea. Mr. Good arrives and avoids the town being damaged by digging a large hole down which Mr. Bad plummets. The Superchums volunteer to teach Mr. Bad to be good. After some lessons, Mr. Bad tries to think of a way to pretend to create something good which is secretly something bad. He takes a giant wooden crate to Crumptonville, and once the Mr. Good and the Superchums have stepped inside, Mr. Bad lowers the box into the ground. Now free, Mr. Bad resumes pushing Crumptonville into the sea. Brass Butt escapes out of the ground and, mistaking the Bulldozermobile for a milk tanker, shakes it until Mr. Bad flies out. He lands in the hole and is followed by his bulldozer. Mr. Good celebrates by giving the Superchums copies of his book.