Thefilmtellsthestoryofhow,inpost-warSpain,Narcisa(playedbyAriaBedmar),anovicewithsupernaturalpowers,arrivesataformerconvent,nowaschoolforgirls,tobecomeateacher.Asthedaysgoby,thestrangeeventsandincreasinglydisturbingsituationsthattormentherwilleventuallyleadhertouncovertheterriblewebofsecretsthatsurroundtheconventandhauntitsinhabitants.