In 1978, one of the scariest movies of its time took to the big screen and sent babysitters around the world into a frenzied panic. In this contemporary re-imagining of that classic, high school student Jill Johnson (Camilla Belle) settles in for a routine night of babysitting in a remote hilltop house. With the children sound asleep and a beautiful home to explore, she locks the door and sets the alarm. But when a series of eerie phone calls from a stranger insist that she "check the children," Jill begins to panic. Fear escalates to terror when she has the calls traced and learns they are coming from inside the house. Jill must summon all of her inner strength-brain, brawn and sheer animal instinct-if she is going to fight back and make it out of the house alive.