After a dangerous delivery, the crew eats at Fishy Joe's, and Leela gets upset because of the vague sources of fast food. They goes to the local farmer's market to buy known foods (and some Zuban cigars for Bender). She blackmails the crew to eat them, but Fry decides to hatch an egg after learning that the ones bought are fertile.
Fry raises the egg for a week, and it hatches into a horrific monster that he names Mr. Peppy. Mr. Peppy grows to full size in a few days, and Farnsworth discovers that Mr. Peppy is a ravenous Bone Vampire. Realizing they can't keep it on Earth, they send it back to its homeworld, Doohan 6, to repopulate the species.
After setting Mr. Peppy free, the crew goes to a nearby barn where they tell the villagers that they set the creature loose, thus threatening the populace. Leela's friend Angus McZongo spearheads the hunt as Fry assures them that Mr. Peppy is harmless. After Leela is attacked by Mr. Peppy, Fry decides to kill his pet himself. When he shoots, however, it is revealed to by McZongo dressed in a bone vampire costume, and admits that he was responsible for the attacks. Suddenly, they notice Mr. Peppy sucking the skeleton from some sheep, and Fry decides to kill him until the villagers spare the beast because they can use it as a clever way to slaughter their excessive livestock without having to debone them. McZongo is later arrested and the Planet Express Crew does one more drive by at Fishy Joe's