After their car runs out of gas, the Pac-Family winds up in an old western ghost town. Sure enough, the Ghost Monsters aren't far behind with their young cousin Dinky in hope of recreating an old "Chomp Out"--only with them as the victors to prove he can have the potential to be an expert chomping Ghost Monster. But all Dinky has on his mind is getting an ice cream cone!

Alors qu’ils partent en vacances dans l’ouest, les fantômes gloutons et leur cousin bratty, Dinky, tentent de gâcher les vacances de la famille Pac.