 Timmy Turner and Jimmy Neutron are both preparing for their upcoming Friday the 13th school dances. Remembering his time with Cindy Vortex from Retroville, Timmy decides to pick her up and take her to Dimmsdale, creating another rivalry between Jimmy & Timmy, which Professor Calamitous thinks he can take advantage of. However, not even Neutron s arch-nemesis is safe when Anti-Cosmo breaks Anti-Wanda and all the other Anti-Fairies out of Fairy World Prison to bring so much bad luck to Timmy s universe, that Friday the 13th could remain on the calendar forever.