Shotfromthepointofviewofhiddencameras,thefilmfollowsathirty-somethingcouple,JamesandAmyDeakin,astheyaresecretlyvideotaped24\/7byamysteriousstalkerintheirhome,onthestreetsandattheirworkplace.Thestalkerusesinformationgleanedfromthefootagetosubtlymanipulatetheunsuspectingcoupleandcracksintheirrelationshipsurface.WhenAmysuddenlyvanishes,Jamesisnotsurewhethershehasbeenabductedorhassimplylefthim.Astheactsofthetormentorbecomemoretwistedandviolent,Jamesdesperatelytriestofigureoutwhoisbehindtheterrorinordertosavehiswife.Butitseemsthestalkerisalwaysonemoveahead…