The sudden appearance of a man's booted feet had Addis snapping her mouth shut. Screaming, she kicked out at the tall, muscular guy as he dragged her from beneath the desk...

It was a scene from a horror movie; Gabriel Kensington and his wife Lydia found, brutally slain in their luxurious home in New Mexico. The frantic, whispered phone call from their teenage daughter Addis, spending the evening with best friend Emerson, quickly alerts the authorities to the killings - and worse, that the killer is still inside the house.

But when detective Alyssa Wyatt and the squad appear at the house, the unthinkable has happened - the girls are nowhere to be found.

Waking up in a dilapidated cabin, nestled high in the woods north of Albuquerque, the girls find themselves at the mercy of a brutal stranger who could take their life at any moment. While they fight for survival, it's up to Alyssa Wyatt and her partner Cord to discover just why the Kensingtons have been targeted - and fast.

Because for Addis and Emerson, solving this mystery might just mean the difference between survival - or an unthinkable death...