Out of work TV cameraman Ron Kobelski is approached by his formerly reclusive neighbor Walter Ohlinger. Ohlinger claims that he was the mysterious "second gunman" that shot and killed President Kennedy. Ohlinger has kept quiet all these years, but has decided to tell his story now that he has been diagnosed with terminal cancer. Kobelski is skeptical of his neighbor's story, after his investigations provide ambiguous answers. His attitude changes, however, after he receives threatening messages on his answering machine, and spots shadowy figures in his backyard. Is Ohlinger telling the truth? Or is there a bigger conspiracy at work?

When an explosion at a top-secret government lab injures an elderly janitor, no one could have expected the terrifying results. Exposure to mysterious chemicals causes him to undergo a bizarre transformation. He is slowly... incredibly... growing younger every day. Now, a ruthless CIA assassin will stop at nothing to take him prisoner and turn him into a government guinea pig. With his future on the line, the janitor goes on the run with his wife and a feisty female agent. All the while, he continues to transform... into a being with powers that are as deadly as they are unimaginable.