- Narrator: [Opening Narration] A small, private plane crashes, leaving no trace of its victims. A mail truck is attacked - two security guards killed. A killer disappears in a burst of flame. News items too incredible to be taken seriously - except by one man. David Vincent's only possible conclusion: the killers had been aliens and, for reasons of their own, might even be attending their victim's funeral.
- Narrator: [Epilog Narration] For David Vincent, every friend is a potential enemy. His enemies understand this. Someday, perhaps, his friends will, too.