BETWEENWAVESisascience-fictiondramaticfeaturefilmaboutawoman'spursuittojoinhermissingloverbycrossingintoaparalleldimension.Evenafterhispresumeddeath,JamiecontinuestobevisitedbyherloverIsaac,aquantumphysicist,whopleadsforhertojoinhiminaparallelplane.JamiefollowsamapandnotebookIsaacm.77mi.ccleftforherandembarksonajourneytotheislandofSãoMiguelintheAçores.AtthecenteroftheAtlanticOcean,JamiebeginstountanglethetruthofwhatreallyhappenedthenightIsaacdisappeared,learningthatshehadagreaterpartinitthanshecarestoremember.Burdenedbyapoliceinvestigationbackhome,andinturmoilaboutherchoicetoterminateherpregnancy,JamieishauntedbyIsaac'sinter-dimensionalvisitsashepersuadeshertojoinhim.JamiehopestogetsomeclaritywhenIsaac'sformerresearchpartner,Renata,showsupontheislandtohelp.DoesRenatabelieveJamieorisshejustafterthenotebookIsaacleftbehind?Straddlingafinelinebetweenenlightenmentandmadness,howfarwillJamiegobeforeshe'sintoodeep?