Ju-young is a young woman with a hearing impediment who decides to investigate her sister's inexplicable disappearance, last seen in her apartment. Feeling more and more cornered, Ju-young begins to hear strange sounds and sense an evil presence in the apartment.
as Joo-young
as Gi-hun
as Jeong-in
as Park Geun-bae
as Joo-hee
as Head of the Women's Association
as Security Guard
as Detective
as Management Director
as Ex-Head
as Detective
as Yeon-woo
