Kay and Jay come together once more to serve as Earth’s last line of defense against a dangerously captivating villainess who poses the greatest challenge to the Men in Black’s mission: safeguarding the planet from the universe’s worst. Four years have passed since these alien-hunting agents thwarted a catastrophic intergalactic threat. Now, time is of the essence as Jay faces the daunting task of convincing Kay—who not only has no memory of his past with the MIB but is also the last living individual with the skills needed to save the galaxy—to rejoin the organization before Earth faces total annihilation.