Foop escapes from Abracatraz and, using a recording of Jorgen's voice, tricks Wanda into thinking that Jorgen has rehabilitated Foop and that the Anti-Fairy baby is ready for a play date with Poof. While Foop seems to have good intentions at first, as soon as Cosmo and Wanda turn their backs on him, Foop terrorizes Poof, and then cries and blames Poof when his parents return and threaten to throw his stars in his Good Boy chart in the trash. Timmy is the only one who can warn Cosmo and Wanda of Foop's true intentions, but his parents continue to pull Timmy away before he can speak; and if Poof keeps committing a crime and getting himself into trouble with the law, then he will be arrested and sentenced to twenty years in prison--in Foop's inter-dimensional play pen of doom, anyway.

Poof becomes sick with Chicken Poofs, an infectious fairy disease that turns him into a chicken and turns other people into chickens when he sneezes on them. Although Dr. Rip Studwell has the cure, Poof, afraid of the needle, runs away. Timmy and Cosmo must catch him and cure his illness before the whole of Dimmsdale is turned into chickens. Meanwhile, Dr. Rip Studwell and Wanda search a Fairy World temple for more medicine since all of it has been accidentally dropped.