On a Halloween night 300 years ago, something rose out of a Scottish bog to curse the McCafferty clan. Now, in 2010, single mother Merran McCafferty finds her suburban Halloween celebrations torn apart by the arrival of the Samhanach, an ancient trickster demon. When the Samhanach tries to steal Merran’s young daughter, Merran is forced to put aside reason and accept that magic is real, and bogies really do exist on Halloween night.