Bob and his family are forced to spend the weekend at Mort the Mortician's while the restaurant is being eradicated of toxic mold. Linda and Bob double-date with Mort and a female mortician he meets on-line, while Tina babysits Gene and Louise at the crematorium.
In an homage to Jaws, Bob's landlord and pier proprietor Mr. Fischoeder buys a mechanical shark as a pier attraction, but when it turns wild and starts terrorizing the town, it's up to Bob and the family to stop it.
Bob scores a temporary gig as a cook at an "underdog" frat house and discovers that he fits right in! Hijinks ensue as Bob and the rest of the fraternity brothers find themselves in the middle of a collegiate prank war that involves the house's most famous alumnus, Dr. Yap. Meanwhile, the kids are on a mission to invade the frat house and get in on the action.