ThefilmadaptstheE.O.Chirovicinovel,TheBookofMirrors.ItsprotagonistisformerhomicidedetectiveRoyFreeman,whointhewakeofacutting-edgeAlzheimer’streatment,istaskedwithre-examiningabrutalmurdercasefromhispast—thegrislymurderofacollegeprofessor.Intriguedandfightingtoregainhismemory,Royenlistshisformerpartnertohelphimrevivetheinvestigation.Thistimethough,thingsunfoldverydifferentlywhentheyencounteramagneticandmysteriouswoman:asheuncoversatangledwebofcontradictionsandsecrets,Royisforcedtofaceahorrificrealitythatchangeshisworldforeverintheblinkofaneye.