When flying saucers are detected surrounding Earth, the whole world awaits with bated breath to see what will transpire. Among them is the President of the United States (Jack Nicholson), who is assured by his science advisor (Pierce Brosnan) that the coming aliens are utterly peaceful. When the aliens land, they are green, garish, and very cheerful - but appearances could prove very deceiving. Various celebrity faces including Michael J. Fox, Danny DeVito and Martin Short appear in roles (and sub-plots) of all sizes in director Tim Burton's quirky spoof of alien invasion movies.