Salesman Roy Knable spends all his free time watching television, to the exasperation of his wife, Helen. One day, TV salesman Spike convinces Roy to buy a satellite dish offering 666 channels. The new addition to Roy's home entertainment system sucks him and Helen into Hellvision, a realm run by Spike, who is an emissary of Satan. For 24 hours, the couple must survive devilish parodies of TV programs if they want to return to reality alive.

Linda and Michael, married for ten years, desperately want a baby and turn to an adoption agency which introduces them to Lucy, a teenage girl expecting her first baby. The three agree that Linda and Michael will adopt Lucy's baby and that Lucy will sign away custody. Things don't go quite to plan however..