A recently released patient from a mental institution returns home with her sister, only to face disturbing events between her stepmother and the ghosts haunting their house – all of which are connected to a dark past in the family's history. After being institutionalized in a mental hospital, Su-mi reunites with her sister, Su-yeon, and they return to live at their country home. But strange events plague the house, leading to surprising revelations and a shocking conc...