I'm really not too sure what the synapse listed to this movie is referring to because it's really not close to what this British Made-for-TV movie is about. I mean, there is a mentally disturbed MAN but he's not left home alone, in fact, his family is very much home and even entertaining guests who are directed to ignore the young man. It's a bit talky, lots and lots of dialog, the same thing over and over again. He fears his family, specifically his general practitioner father have been replaced by "Pod people" for lack of a better term. He's quite paranoid, feels his family isn't really his family and there's a mass conspiracy to send him back to the mental hospital, there's really no doubt he's crazy but questions are raised about his parents.