Ja-youngandherfriendsdecidetoshootavideotitled“SpiritSummoningThatTellsYouEverything”foraYouTubecontestwithacashprize.Initiallyplanningtostagethewholeeventasfiction,theybeginfilminginthewatertankofanabandonedbuilding.However,promptedbyJa-young’ssuggestion,theyattemptarealséance.Ja-younghopestouncovercluesaboutheroldersister,whowentmissingwhentheywerechildren—butwhatbeginsasaplayfulritualsoonspiralsintoaterrifyingexperiencenoneofthemcanhandle.Whatstartsoutascuriosityandfungraduallytransformsintoanightmare.Theséance,conductedinaconfinedandclaustrophobicspace,isrenderedwithchillingrealism,adheringtotheconventionsofclassichorror.Thefilmskillfullybuildstensionthroughtheoccultelementofspiritsummoning,whilealsorevealingtheslowunravelingoffriendshipsandlong-buriedsecrets,maintainingstrongdramaticmomentumthroughout.Standingapartfromtypicalteenhorror,thefilmboastshighgenrepolishandgrippingperformancesfromactorslikeKimYerimandLeeChanhyeong.Withitsimmersiveterrorthatmakesviewersfeelasifthey'repartoftheritual—andafinalethatdefiesallexpectations—itleavesalastingimpression.