Attempting to flee her busted past, Sarah O'Neill is currently constructing a new life on the fringes of a backwood town with her son Chris. A chilling encounter with a mysterious intruder shatters her fragile security, throwing Sarah into a spiralling nightmare of paranoia and mistrust, as she tries to detect whether the upsetting shifts in her tiny boy have been attached into a menacing sink hole buried deep in the woods that borders their property.