Lisa, Bart, and Homer eat too much candy, and end up having nightmares. The Simpsons, on a foreign trip, pick up a monkey's paw that gives the holder four wishes each with bad side effects. Next, parodying a Twilight Zone episode, everyone in Springfield must be happy or something will happen to them. Finally, Homer gets randomly fired from SNPP, and gets hired as a grave digger. He falls asleep in the grave, and gets picked up by Mr. Burns for an experiment.