On a frigid December night, Megan Floyd vanishes from the mountain town of Fraser, Colorado. The extensive search provides no answers and as attention of her disappearance fades, the case goes cold. Her father, Tom Floyd, is forced to confront his worst fear that his daughter will never be found, and soon his life and marriage begin to disintegrate around him.

A year after the disappearance and with no new leads, Tom hires private investigator Marshall York, a former detective, and his assistant Hannah Jacobs. They soon start to uncover the secrets of Megan's dangerous second life, all while fighting their own demons. Tom is guilt-ridden over a missing child case from his past, and Hannah is haunted by the unsolved murder of her older sister.

The case begins to consume all three of their lives, and as they dig deeper, they start to unravel the dark truth of what happened to Megan.