1940: the entire population of Friar, New Hampshire walked up a winding mountain trail, leaving everything behind. 2008: the first official expedition into the wilderness attempts to solve the mystery of the lost citizens of Friar.

Miles Grissom offers $30,000 to the first person who can prove to him that we go on after death.

When Simon brings his twelve-year-old son, Finn, to rural Vermont to help flip an old farmhouse, they encounter the malicious spirit of Lydia, a previous owner. And now with every repair they make, she's getting stronger.