In the aftermath of an alien invasion, young police officer Snow King fights to protect what's left of his city. As terrifying skinwalkers, monstrous, shape-shifting predators, tear through the streets, Snow is forced to make impossible decisions. With limited resources and a small group of survivors, including a pregnant nurse and an elderly woman, he races against time to save those he can while facing the brutal reality of an apocalyptic world. But as the threat grows and hope fades, Snow must confront his darkest fears in order to survive, and protect the ones he loves.