Two of the most self engrossed parents (Dennis Weaver and Valerie Harper) and their bickering little brats move to a new house. They are happy for a change after the death of their daughter Jennifer. Grandma is also moving in, she's a pushy old battleaxe who likes to criticize everything. In other words, no one is very charming here. More information is revealed regarding the personalities of these people as we move forward. Dad is drinking way too much, in fact Dennis Weaver spends most of the film in a drunken stupor. He was wise, if I had to deal with those ungrateful kids I would probably do the same. He also has no say in matters of the house, this is quite apparent by the way his wife squashes his nuts anytime he tries to add his input. Like Mother Like daughter, which means she and her Mother do quite a bit of arguing as well.
The very first night in the new house their daughter Mary startles everyone awake with screams. They rush to her room only to find her bed engulfed in flames. She claims something that was under the bed did it. Upon investigation her father finds a lamp with a faulty wire and the mystery is explained. The following night while sharing a room with her brother Kevin, Mary hears her name being whispered and freaks out again. Soon after she discovers the voice is actually the ghost of her dead sister Jennifer. She tells Jennifer she will keep her presence secret and the two girls begin to concoct mischief. Before we know it people are dying all around them and the whole family becomes unraveled.