The first film, "Men In Black," follows the story of Agent J (Will Smith), a newly recruited agent of the Men In Black (MIB), an organization tasked with monitoring and regulating alien activity on Earth. Agent J, along with his partner Agent K (Tommy Lee Jones), must prevent an alien from obtaining a powerful device that could destroy the Earth.

The sequel, "Men In Black II," takes place a year after the events of the first film. Agent J is still reeling from the death of his partner, Agent K, who was neuralyzed (a process that erases a person's memory) at the end of the first film. Agent J is paired with a new partner, Agent X (Emilio Estevez), but their mission to stop an alien threat becomes complicated when Agent J discovers that Agent K's neuralyzed memories are hidden in his own mind.

The movie "Men In Black" is a science fiction comedy film series that has gained a significant following worldwide. The first two installments, "Men In Black" (1997) and "Men In Black II" (2002), are particularly notable for their unique blend of humor, action, and science fiction elements.