As Kelly's 18th birthday approaches, she repeatedly whines about the fact that she doesn't want to have a party. She feels that she would just end up being ignored on what is supposed to be her day. The family decides to go to Las Vegas for the weekend, and Ozzy will play a show. Sharon insists that the whole thing will be a low-key affair. Kelly becomes upset when Jack decides to bring eight friends along on the trip.

Jack and company wind up sitting around the hotel room watching Teletubbies because they can't get away from security. Jack complains to Sharon about how unfair this is. Kelly and Sarah get very drunk, and Sarah does a striptease atop a table while Sharon, Ozzy and other adults are trying to have dinner.

Jack and his friends eventually make it downstairs. Kelly gets very upset because she thinks Jack is stealing her thunder. Kelly and Sarah have an altercation with some girls who are hanging out with Jack and Dill, as one of them apparently looks at Kelly the wrong way. Sharon pleads with Kelly not to go back downstairs and cause trouble, to no avail. Kelly screams at Jack for ruining her birthday. Meanwhile, Ozzy plays the slot machines, and eventually wins a small jackpot.