An ex-Marine finds himself thrust into hostilities on an alien planet filled with exotic life forms. As an Avatar, a human mind in an alien body, he finds himself torn between two worlds, in a desperate fight for his own survival and that of the indigenous people.

Men in Black follows the exploits of Agents Kay (Tommy Lee Jones) and Jay (Will Smith), members of a top-secret organization established to monitor alien activity on Earth. The two MIB find themselves in the middle of a deadly plot by an intergalactic terrorist (Vincent D~Onofrio), who has arrived on Earth to assassinate two ambassadors from opposing galaxies. Kay and Jay face a simple imperative: track down the interloper or Earth will be destroyed. It~s all in a day~s work for the Men in Black.