Harry Adams has always loved horror movies, so it’s not a total coincidence that she took the job cleaning house for movie director Javier Castillo. His forbidding graystone Chicago mansion, Bright Horses, is filled from top to bottom with terrifying props and costumes, as well as glittering awards from his career making films that thrilled audiences --- until family tragedy and scandal forced him to vanish from the industry. Javier values discretion, and Harry has always tried to clean the house immaculately and keep her head down. But then she starts hearing noises from behind a locked door. They sound remarkably like a human voice calling for help, even though Javier lives alone and never has visitors. Harry knows that not asking questions is a vital part of working for Javier, but she soon finds that the sinister house may be home to secrets she can’t ignore.

Celia wakes up in a house that’s supposed to be hers. There’s a little girl who claims to be her daughter and a man who claims to be her husband, but Celia knows this family --- and this life --- is not hers. Allie is supposed to be on a fun weekend trip --- but then her friend’s boyfriend unexpectedly invites the group to a remote cabin in the woods. No one else believes Allie, but she is sure that something about this trip is very, very wrong. Maggie just wants to be home with her daughter, but she’s in a dangerous situation and she doesn’t know who put her there or why. She’ll have to fight with everything she has to survive. Three women. Three stories. Only one way out.