When the South Park school system changes what books the kids get to read, Mr. Garrison takes it upon himself to introduce a previously-banned book to his class. The book excites and inspires the kids, so much so that they decide to write their own book.
The book they come up could get them in trouble if Stan's mother finds it, however.
Tune in to Comedy Central when South Park airs on Wednesday, March 24th at 10:00pm ET. "The Tale of Scrotie McBoogerballs" will re-air multiple times throughout the week; you can catch it at 12:00am and 10:30pm on Thursday, 11:00pm on Sunday, and 2:30am and 10:30pm on Monday.