Kay and Jay reunite to provide our best, last and only line of defense against a sinister seductress who levels the toughest challenge yet to the MIBs untarnished mission statement: protecting the earth from the scum of the universe. It’s been four years since the alien-seeking agents averted an intergalactic disaster of epic proportions. And now it’s a race against the clock as Jay must convince Kay-who not only has absolutely no memory of his…