This cunningly nasty psychological horror thriller, starring Dominic Monaghan, does a good job of wrong-footing the viewer.

When Monaghan’s creepy loner begins stalking his old high-school crush (Ksenia Solo), we have a pretty good idea where the story is headed.

By the time he’s started constructing a cage in the basement of the animal shelter where he works, we’re convinced we know what lies in store for her and for us.

But just when we think we’re in for standard-issue torture chills, director Carles Torrens and writer Jeremy Slater make us think again what it means to be a predator and a victim…