Two friends work as cleaners whose jobs are to clean homes and places where people have died or dead bodies are found. One day, they are tasked with cleaning a house where there were three dead bodies inside. Their job is to clean the corpses that have rotted. When they arrived there, they found that there are strange things happening and then they discover a strange book.

　　Ateamofinfluencerbloggersdecidestoholdaritualatthemansionofthe"blackcountess".Afanofthesupernatural,shedisappearedwithoutatraceaftershewasofferedtoplayagamethatwassupposedtotakehertoanotherdimension.ByevokingthespiritoftheCountess,bloggersletotherworldlyforcesintotheworld.Theonewhocanbringthedemonsbackwillsurvive.