Four years after the close of the first installment, Jay (Will Smith) must convince his former partner, the amesiac Kay (Tommy Lee Jones) , to leave his postal career and return to his life as an agent in order to stop the evil Serleena who is runing amuck on Earth in her quest to steal the light of Zartha. Action, romance, a ticking clock, out-of-this-world weaponry, a slew of new aliens including one whose human form is that of a lingerie model and all the favorite players from the first movie make for lighter, slightly derivative but fun fare.