The Earth is invaded by alien parasites aka "slugs" that ride on people's backs and control their minds. A trio of American government agents attempt to thwart this.
Ray Kinsella is an Iowa farmer who hears a mysterious voice telling him to turn his cornfield into a baseball diamond. He does, but the voice's directions don't stop -- even after the spirits of deceased ballplayers turn up to play.
Gilbert Grape is a small-town young man with a lot of responsibility. Chief among his concerns are his mother, who is so overweight that she can't leave the house, and his mentally impaired younger brother, Arnie, who has a knack for finding trouble. Settled into a job at a grocery store and an ongoing affair with local woman Betty Carver, Gilbert finally has his life shaken up by the free-spirited Becky.