Sequel to the successful sci-fi-cop, comedy-drama. Some four years after the Men in Black averted a major intergalactic disaster, K (Tommy Lee Jones) has returned to a civilian life, working as a postman and quite unaware of his former heroics alongside Agent J (Will Smith). But when J uncovers a secret alien plot organised by the seemingly seductive Serleena (Lara Flynn Boyle) he has to call on K again. Unfortunately K has no memory of his former role as 'Saver-of-the-World', but somewhere in his head is the expertise that can save the Earth, if only J can get him onside in time.