Jimmy is fired for peeping on girls in the changing room and Todd vows to clear his name, but the gang find the real culprit difficult to identify - because he's invisible.
The gang make plans for a surprise party for Curtis's birthday, while a Puritan girl uses the book to make herself a giant birthday cake that eats students on their birthdays.
The Phantom of Crowley High returns and switches roles with Hannah to get Curtis back. The three dudes realize that Todd must lose his virginity to become the Pure Evil One. Atticus comes to terms with his past. And nobody can stop singing.
When a paraplegic student uses the book to give himself fast legs, Todd jumps on his back and gets transported to the future, where Atticus has taken over as Satanic Overlord.
Atticus takes the book and brainwashes the students of Crowley High to do his bidding, forcing a showdown with Todd at the semi-formal. Secrets are revealed, romances blossom and tragedy strikes, threatening to tear apart the gang for good.