Eddie returns to his home town hoping to pick up the pieces of his broken life. There he meets Amy, a mysterious young woman with an undeniable allure. Eddie falls for her, but he doesn't know that Amy is a conduit - a channel for evil that she must spread to others through attraction.
Agents J and K are back...in time. J has seen some inexplicable things in his 15 years with the Men in Black, but nothing, not even aliens, perplexes him as much as his wry, reticent partner. But when K's life and the fate of the planet are put at stake, Agent J will have to travel back in time to put things right. J discovers that there are secrets to the universe that K never told him - secrets that will reveal themselves as he teams up with the young Agent K to save his partner, the agency, and the future of humankind.
Youngsters called Kildren, who are destined to live eternally in their adolescence. The Kildren are conscious that every day could be the last, because they fight a war as entertainment, organized and operated by adults. But as they embrace the reality they are faced with, they live their day-to-day lives to the full.