Mo’s wife, Wen Ling, is hospitalized for cancer, plunging him into the fear of losing her. One night, their ten-year-old daughter, Fen, is startled awake by peculiar howls. To her surprise, she discovers the animalistic sounds come from her sleeping father. Fen secretly starts observing him, attempting to unravel the clues of his dreams by using the DV recorder her mother once used to document their life. As Mo struggles to suppress his emotions, fearing he might fail in caring for his daughter, he sketches a black dog on an architectural drawing, trying to decode the mysteries haunting his sleep…