Holidays are approaching, so Hawthorne College, as every year at this time, is getting empty. But not everyone leaves the campus. Riley Stone (Imogen Poots) and her sisters from the student association - athlete Marta (Lily Donoughe), rebel Kris (Aleyse Shannon) and gourmet Gourmet Jesse (Brittany O'Grady) - are preparing for a series of Christmas parties.

Meanwhile, a mysterious, masked killer appears on campus who kills young women one by one. As the number of victims increases, Riley and her friends begin to wonder who they can trust. All men are suspects. Marta's boyfriend - Nate (Simon Mead), Riley's new crush - Landon (Caleb Eberhardt), and even the recognized professor Gelson (Cary Elwes).

Whoever the murderer is, he will soon discover that today's young women have no intention whatsoever of being victims.

This December, on the thirteenth, we wish you a merry Christmas!

Blumhouse is responsible for the production of the film, which gave us such horror movie classics as "Marked", "Paranormal Activity", "Run!" Or "It's us".