Don't let her inside...
Four months after the death of her husband, a woman on the brink of motherhood is tormented in her home by a strange woman who wants her unborn baby.
Four months before Christmas, Sarah and Matthieu Scarangelo were in a car crash, of which Sarah and her unborn baby were the only survivors. On Christmas Eve, Sarah stays home alone, where she grieves her husband and prepares to go to the hospital the next morning for the delivery. As night falls, a woman knocks on Sarah's door asking to use the phone. When she refuses, the woman reveals that she knows Sarah and tries to force her way in. Sarah calls the police; they inspect the home and determine the woman has left, but promise to keep watch over Sarah through the night. The woman returns and tries to take Sarah's unborn child, but Sarah locks herself in the bathroom. The strange woman torments Sarah through the night and kills all who try help her.
While driving in a rainy day, the pregnant photographer Sarah crashes her car against another one in a road with no survivors. Four months later, in Christmas Eve, Sarah decides to stay alone at her home, grieving her deceased boyfriend Matthieu and preparing to go to the hospital on the next morning for the delivery. During the night, a stranger wearing black heavily hits on her front door asking to get inside, but Sarah calls the police and the woman vanishes. Later, while sleeping, Sarah is attacked by the woman that broke in her house with a pair of scissors and she runs to the bathroom. During the bloody night of terror, the woman attacks Sarah's visitors and discloses to Sarah who she is and what she wants.
Depressed after the ghastly car accident that killed her husband in a horrible head-on collision, the young mother-to-be, Sarah, suddenly, finds herself all alone. Four months later, with Christmas Eve just around the corner, nothing much seems to have changed in Sarah's mental condition; she is still unable to come to terms with her loss; she is still overcome with silent grief, and her only refuge is her work as a photojournalist. Then, unexpectedly, in the dead of night, a knock at the door by an unknown woman in distress will pave the way for a demented razor-sharp nightmare, as the unrelenting raven-haired intruder has deeply malevolent intentions. Now, the pitiless woman in black wants something precious from Sarah, and she will stop at nothing to get it. Is there an escape from this blood-soaked Yuletide horror?