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.

A promising runner, Do-won, after getting injured in an accident, runs to meet his best friend from childhood, Jin-su. In that brief joyful moment of being reunited with Jin-su who seemed different from their pure past, Do-won got caught up in an unexpected incident. Can we still be able to get out of this situation of falling into the depths, and face the future where we had the same dream?