After watching an old cartoon, Timmy wishes himself and his grandpa, Pappy, inside a 1930s cartoon.

Needing a date for the school dance, Timmy Turner returns to Retroville, but this time he takes Cosmo and Wanda with him. There, Timmy meetsCindy Vortex, but a problem arises when he and Jimmy Neutron fight over who gets to take Cindy to the Friday the 13th Dance, and given the date, the Anti-Fairies are up to stop the Earth's rotation to make Friday the 13th last forever.

Professor Finbarr Calamitous wants to blow up the universe and after seeing Timmy's Godparents, he decides to go to Timmy's universe to get a fairy to help with his plan. He gets a fairy, ironically, Jorgen Von Strangle, the leader of the fairies.