Pretty Little Liars: Original Sin takes viewers to Millwood, a blue-collar town still healing from tragic events that took place 20 years ago.

An unknown assailant has begun tormenting a disparate group of teen girls — a new generation of "Little Liars" — to make them pay for their parents' secret sin... as well as their own.

Tiffani Thiessen and Josh Hopkins star in this festive family adventure directed by Douglas Barr. Northpole, the magical land where Santa Claus (Robert Wagner) lives, is powered by the festive spirit generated by people around the world. However, as modern life takes over and people have less time to spend with their families over Christmas, Northpole is rapidly losing power and so it is left to one young boy, Kevin (Max Charles), to convince his family to save Christmas.

Payton Brave's twin sister, Dylan, has been missing for more than a year. So has Payton's memory. Amid the turmoil of her sister's disappearance, Payton feels lost as the one left behind. Her mental state wrought and reckless, she tumbles from the graces of popularity to the outskirts of high school society, where she attracts a rag-tag group of friends-and a troubling romance with her sister's boyfriend, Cole. Though Payton remembers nothing of the day Dylan disappeared, she must pry into her own mind when another missing girl's body is recovered from a nearby lake, the victim's features eerily similar to Dylan's. The further Payton presses into the recesses of her memory, the more danger surrounds her. The darkness around her sister's disappearance grows and the truth becomes more and more unbearable. What she finds might just cost Payton her life. Losing Brave: Is written by award-winning actress Bailee Madison (Once Upon a Time, Bridge to Terabithia) and Reader's Choice Award Finalist Stefne Miller Features forbidden romance, intense action, and high-stakes sacrifice