On a winter night in the small town of Preyton, Nebraska, exhausted mother Laura Montgomery sends her daughters Courtney and Allison outside to make angels in the snow, but only Courtney returns. When Allison’s bloody shoe is found matching the modus operandi of a notorious serial killer still on the loose, Courtney learns to live in the shadow of her sister’s death until one day her boyfriend suggests that Allison may still be alive.

A few hundred miles away, young Katie has been locked in her bedroom for years enduring the rage and abuse of her charismatic father and the indifference of her abused mother. When her mother becomes a Christian, Katie’s world begins to expand. Empowered by her newfound faith, Katie’s mother begins to shield Katie from her father’s abuse and hatches an escape plan that will leave one of them dead.