Hannah had a perfect life in London until she did something shocking that landed her in a high-risk psychiatric unit. Since Hannah has been admitted, two women have died, including Charlie, one of her closest friends in the institution. She is convinced there’s a serial killer picking off the patients one by one, passing their deaths off as suicides. But why? And who will believe her? At first, Hannah’s mother Corinne assumes that her outlandish claims about a killer in the unit are just another manifestation of her psychological condition. But as she starts to uncover strange inconsistencies surrounding the unit's charismatic director, Dr. Roberts, she begins to wonder if her daughter might have stumbled upon the truth.

Out Christmas shopping one December afternoon, Jessica Gould meets the charming Dominic Lacey and impulsively agrees to go home with him for a drink. What follows is a Twelve Days of Christmas from hell as Lacey holds Jessica captive, forcing her to wear his missing wife’s gowns and eat lavish holiday meals. Each day he gifts her with one item from his twisted past --- his dead sister’s favorite toy, disturbing family photos, a box of teeth. As the days pass and the “gifts” become darker and darker, Jessica realizes that Lacey has a plan for her, and he never intends to let her go. But Jessica has a secret of her own --- a secret that may just mean she has a chance to make it out alive.