Once the head of the guidance system design at NASA, but sidelined by mandatory retirement, Paul Popperman, is facing a life that he was not prepared for. He’s already suffered through the loss of his daughter and her husband in a car crash, and his selfish wife, Belle, filing for divorce when she meets a very rich man. But he has his granddaughter, Carrie. She is the one thing that helps him connect with reality and possibly sanity. She is his joy, and reason for living. To fill his time, he’s opened a little fix-it shop in a somewhat broken down part of town. Cheap rent, lots of room, and a place to put all his testing equipment and hardware. It’s not much of a business, but it’s his special place to play with Carrie, of whom now ex-wife and recently re-married Belle has custody. But Belle is a foolish woman, more vain than intelligent, and she and her millionaire husband, Harold, treat Carrie more like a trophy than a family member. Pops is worried, and decides to use his scientific know-how to keep constant watch on Carrie’s well-being. Taking Carrie’s favorite doll, Missy, and “re-engineering” the doll with servo motors, cameras and sound equipment, and the ability to broadcast whatever is happening to Carrie, Pops is witness to a terrible event.
Belle and Harold have invited 8 of their friends for dinner in their new home. Carrie is not feeling well and carrying her doll, interrupts the dinner several times. Belle will have none of it, and keeps sending Carrie back to her room. Carrie has a fit of dizziness, and falls down a long flight of stairs, the doll falling with her. When she hits the marble floor, she dies instantly, all to the horror of Pops, who sees the whole thing, and snaps. One by one, each of the dinner guests meets an untimely end, with Belle the last to go. A police detective, Bob Yurrick, has been following the case, and finally puts together that it is Pops whose behind the killings, but Det. Yurrick has no proof, since it’s dolls who do the killing. When Belle is killed, a small piece of one of the dolls does not self-destruct, and finally Det. Yurrick goes to confront Pops in his shop. But as he enters, he hear Pops talking to a little girl. As Det. Yurrick pulls back the curtain to the back room of the shop, he sees Pops lighting candles on a birthday cake on which we read Carrie’s name. He looks up and says, “So nice of you to come to Carrie’s birthday.” The camera pans over and we see that Pops has built a cyborg of his dead granddaughter, who smiles at Det. Yurrick. The camera pans back to Pops and moves in on his face. Finally we understand that Pops is totally mad and beyond help. Up on a shelf in the rear of the shop we see that there are many more dolls just sitting in the dark. Then their eyes open..