In a world where human beings and puppets live together, when the members of the cast of a children's television show aired during the 1990s begin to get murdered one by one, puppet Phil Philips, a former LAPD detective who fell in disgrace and turned into a private eye, takes on the case at the request of his old boss in order to assist detective Edwards, who was his partner in the past.
After a police chase with an otherworldly being, a New York City cop is recruited as an agent in a top-secret organization established to monitor and police alien activity on Earth: the Men in Black. Agent Kay and new recruit Agent Jay find themselves in the middle of a deadly plot by an intergalactic terrorist who has arrived on Earth to assassinate two ambassadors from opposing galaxies.
The Men in Black have always protected the Earth from the scum of the universe. In this new adventure, they tackle their biggest, most global threat to date: a mole in the Men in Black organization.