This episode starts out with Zim testing out chickens, but throwing them into space. He is about to test the next and last chicken, when the alarm for a security breech comes on. Zim walks outside to find someone in a giant squirell costume, and Zim plays it off like he doesn't know it's a costume. Zim tells the gnomes to capture the squirell, and the gnomes pick it up, drop it, making it break and reveal Dib. Zim tells Dib that he laughs at his pitiful attempt on spying, and Dib tells him that one day, he'll be sitting in his home feeling safe and secure, and then he'll look over Dib'll be there, doing stuff. Zim tells him that unless he found a flaw in his security net, then he'll have to go on and do his stuff, elsewhere, and asked if he's found a flaw. Dib tells him that his defenses could use a little tightening, and Zim yells at him that nothing could get past his defenses, while a pizza man pulls up and walks right past Zim. The pizza man rings the doorbell and gives GIR the pizza. Zim thinks to himself that maybe there is some kind of a flaw.
Inside, GIR takes the pizza out, tears it in two, and throws one half on his face and lets it slide down into his mouth. Zim is standing there gagging because of the smell of the cheese, but GIR says he likes it. Zim also complains about the lip smacking noises. GIR, now full of grease from the pizza, grabs Zim by the head and rubs his head on his, giving Zim some grease on his face. GIR finally gets off of Zim, and he demands some some soap. The soap is finally melted, but there is still grease on his face, because there was bacon in it. Zim looks into the mirror, and sees a spot on his face, and starts poking it. GIR tells Zim that he got a pimple, just like on TV, and he runs to turn on the TV. The commercial is of a boy who has a pimple, and he tells the commercial that his life is now a hideous montage of humiliation and shame. Zim is slightly freaked out about this. The commercial is of Acne Blast cream, that makes pimples go away. Zim says that he must obtain the acne blast, and GIR has some, and starts eating it. Zim takes it away from him and pokes his pimple with it, but the pimple swallows it, making it bigger. Zim yells at GIR, but he is nowhere to be found. Zim looks into the mirror and sees GIR swimming around in his pimple. He tells himself that it is going to be impossible to destoy the planet while everyone is looking at his freakishly deformed head, and GIR is drawing a face on it. Zim tells GIR to stop, and GIR looks at the pimple bobbing up and down, and he is hypnotised. Zim tells him to roll over, and GIR rolls over, saying he obeys. Zim concludes that the pimple has hypnotic powers, and if it works on humans, he can use it on Dib to tell him what he knows about his security system, but he must disquise it first. Zim puts a little suite on his zit, and calls him Postuleo.
The next day at school, Zim hypnotises the whole school at recess. He finally makes it to Gaz, but she tells him to go away. Dib concludes that Zim is using some sort of hypnosis, and he runs into school and tries to stop him. Dib makes it into the classroom, and he tells people not to look into the thing on his head, and a kid screams out "Postuleo Rocks!". Dib tells them that there is no Postuleo, it's just a hypnotic pimple. Zim tells him to look into Postuleo, but he refuses. Zim tells Torque to hold Dib down, and Dib falls under the hypnotic spell. Many times he gets out of the spell, but falls back in to it when Zim tells him he'll let him hold Postuleos hand. He tells Zim that there is a blind spot in the gnome field. Zim is happy, but the zit grows, and finally pops, sprau pus everywhere, making a flood in the school. Zim leaves, and Ms. Bitters makes Dib clean it up. She gives him a tiny sponge, and a large one comes floating by. He asks her if he could use that one, and she said no, and leaves Dib to the cleaning.