On Halloween night, Greg is forced to wear a silly hot dog outfit trick or treating because that's what Sam (the kitty) pointed at when Kim (the genie) took him shopping for costumes. After Jimmy tells him to leave some candy out for the kids, Greg worries his house will get trashed while they're gone. Sam gets tricked when a seemingly sweet old lady says she'll go get him some candy -- which is the cue for her son to jump out of the bushes in a wolfman costume and scare the kids. Sam starts crying and has to be rushed home, and a furious Greg plots revenge. Christine and Jimmy think they should trash the guy's house, but Kim insists on fixing his wagon by writing a stern letter. Greg likes the trashing idea better, but gives in to Kim's wishes. So they both go to the house, drop off the letter, knock on the door, and hide so they can watch their reactions. After the old lady and the man read it and laugh hysterically, Greg and Kim return home, ready to do things the Hughes way. Greg and Jimmy head back out armed with eggs, TP and shaving cream. Unaware that Kim gave them hard-boiled eggs, Jimmy launches one at the house, smashes a window, and sets off their alarm. He and Greg hide behind the family car to avoid being seen, but when the cops show up, they're forced to get in the back seat of the car, duck down, and wait until the coast is clear. It's gonna be a long ride for both of them, for the minute the coast is clear, the old lady gets in the front seat and takes them on a trip to Vegas. They showed her, though -- while trying to escape, they accidentally let her chihauhau, Lionel, out.