Gil's All Fright Diner

Duke the werewolf and Earl the vampire roam the American Southwest in a beat-up truck, taking odd jobs and avoiding trouble. When they pull into Gil's All Night Diner nearly out of gas, the owner Loretta offers them a hundred dollars to clear out the zombies that keep shambling in from the surrounding fields. The dead cattle and reanimated corpses turn out to be the work of Tammy, a high schooler studying an abridged Necronomicon in hopes of becoming Lilith, Queen of the Universe, with the diner as her chosen gateway to the underworld. Duke and Earl, plus an amorous ghost and a few local oddities, are the only line of defense between Tammy's ambitions and a full apocalypse.