12-year-old David is accidentally knocked out in the forest near his home, but when he awakens eight years have passed. His family is overjoyed to have him back, but is just as perplexed as he is that he hasn't aged. When a NASA scientist discovers a UFO nearby, David gets the chance to unravel the mystery and recover the life he lost.
Miriam promises her lovers the gift of eternal life, but John, her companion for centuries, suddenly discovers that he is getting old minute by minute, so he looks for Dr. Sarah Roberts, a researcher on the mechanisms of aging, and asks her for help.
In the later 1960s, two hippies are forced to leave their friends as they are wanted by the FBI, who sees them as criminals. They hide in the jungle for 20 years, secluded from the outside world. In the later 1980s, the find out that a secret war is about to start in the US, and decide to return to New York to tell someone about it.
An intelligent pulse of electricity moves from house to thouse, terrorizing occupants through their own appliances. Having already destroyed one household in a quiet neighborhood, the pulse finds itself in the home of a boy and his divorced father.