Mark (Michael Cole) and Catherine (Deborah Walley) are trying to get to a hospital before Catherine gives birth. Their private plane is caught up in a strange storm and lands in a mysterious small town. Everyone in the town seems to act like zombies, repeating the same lines and the same actions over and over again and living in a trance.
Together with their pilot Tony (Johnny Desmond) they try to escape the town but find it is surrounded by a clear impenetrable barrier. Every seven days a mysterious light in the sky plucks someone to an uncertain but likely to be unpleasant fate up into the heavens above...
The film builds a creepy and mysterious world slowly. We don't really see the aliens (apart from perhaps in one scene) but their presence is everywhere. The leads do well in portraying a growing sense of eerie unease and paranoia. Much remains unanswered but thats no bad thing with a film like this.
