
It has been four years since Agents J and K prevented a disaster of galactic proportions, keeping Earth safe from an extraterrestrial threat known to only a few. Since then, much has changed: Agent K, once the most experienced and enigmatic member of the Men in Black, has chosen a quiet and anonymous life, performing seemingly ordinary duties at the postal service. Meanwhile, Agent J continues his work monitoring and controlling alien activity on the planet, facing the daily challenges of protecting humanity without its knowledge.
However, the apparent calm is about to be shattered. A new threat has emerged in the universe, and its objective is clear: to endanger the very integrity of Earth. This time, the threat is more stealthy, more lethal, and armed with a plan so well-crafted that even the advanced technological and tactical resources of the secret organization may not be enough.
Aware that it will take more than just skill to confront what’s coming, Agent J knows there is only one person who can help him: his former partner, Agent K. But convincing him won’t be easy. K has left his life with the Men in Black behind, erased all memories of the universe’s secrets, and taken on a completely new identity—one far removed from his past.