汤普森夫妇要出去庆祝结婚纪念日，他们平时的保姆来不了，于是他们请了保姆的朋友安娜来照看孩子…A couple's replacement babysitter comes highly recommended but after they leave the children begin to suspect that she is not the person she claims to be when she subjects them to a series of twisted activities. After the children confront her, their usual babysitter rings the door bell, but can she save the children.