When Iowa farmer Ray hears a mysterious voice one night in his cornfield saying ``If you build it, he will come,'' he feels the need to act. Despite taunts of lunacy, Ray builds a baseball diamond on his land, supported by his wife, Annie . Afterward, the ghosts of great players start emerging from the crops to play ball, led by ``Shoeless'' Joe Jackson. But, as Ray learns, this field of dreams is about much more than bringing former baseball greats out to play.