Rock-a-bye baby, on the treetop, Mommy's not home, the killer won't stop..." Jenny wanted to make a little extra cash. And baby-sitting seemed like the perfect solution. How hard could it be? Play with the kids, sing them a lullaby, put them to sleep... But Jenny had it all wrong. The house is dark and creaky. The crank calls are terrifying. And there is a strange man lurking just outside. Someone knows that Jenny is baby-sitting. He knows that the baby is asleep. That Jenny is all alone. And now he's coming for her.