A woman working in the house of a reclusive horror director stumbles upon terrifying secrets, from the author of Good Girls Don't Die and Horseman. Single mum Harry Adams has always loved horror movies, so it's not really a coincidence she took the job cleaning for horror movie director Javier Castillo. His forbidding greystone mansion is filled from top to bottom with terrifying props and costumes, as well as glittering awards from his decades long career making films that thrilled audiences and dominated the box office until his wife mysteriously disappeared and he vanished from the industry.

Javier values discretion, and Harry has always tried to clean the house immaculately, keep her head down, and keep her job safe - she needs the money to support her son. But then she starts hearing noises from behind a locked door. Noises that 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 keeping her job, but she soon finds that the house and her enigmatic boss have secrets that she can't ignore.