For years Ma-Ma had warned all her kooky Addams Family relatives that a UFO was coming to invade the city. She was so paranoid and convinced about this alien invasion, using her crystal ball she cast a protective spell on the Addams house, masking any signs of life forms living within. While moonbathing one night, Uncle Fester saw the aliens descend from the heavens and beam up all of the town's citizens save the Addams Family. Ma-Ma's spell had worked. Armed with his gun and his wits, Fester took it upon himself to set out and rescue all of the townspeople.