The Whisper Description:

Fleeing from their violent father, siblings Lucía and Adrián take refuge in a remote mansion. With the help of a hidden micro-camera on a cat, Lucía uncovers a terrifying secret: their neighbors are part of a criminal network that kidnaps teenage girls to make snuff films, and they intend to get rid of the siblings. As Lucía fights to protect her brother, she must face a dark family curse that follows them into their newfound sanctuary.