ShawnandZachareyoungloverswhomoveintoaguesthousetogetheronanestateownedbyMr.andMrs.Marino.WhenbizarreeventsbegintooccurwithincreasingdangerZachslowlyremembersaforgottentimeinhischildhoodwhenhesufferedfromwhatappearedtobeasevereandviolentpsychosis-memorieserasedbyasseriesofelectroconvulsiveshocktreatmentsadministeredbyhispsychiatrist.AstheterrorssurroundingtheirlivesgrowtodeadlyproportionsandinnocentpeopleareslaughteredZachisforcedtoquestionhisownsanityandfearsforShawn'ssafety.OncethethreatofpsychoticbehaviorturnsintothepossibilityofdemonicpossessionZachisconfrontedwithahorrificrealityhenevercouldbeforehaveimagined