Trying to escape her broken past, Sarah O’Neill is building a new life on the fringes of a backwoods rural town with her young son Chris. A terrifying encounter with a mysterious neighbor shatters her fragile security, throwing Sarah into a spiraling nightmare of paranoia and mistrust, as she tries to uncover if the disturbing changes in her little boy are connected to an ominous sinkhole buried deep in the forest that borders their home.