Charles Dexter Ward, a student interested in metaphysics, forms a connection with Erich Zann, an elderly violinist who lives above him in a boarding house. Their shared interests deepen their friendship, particularly Ward's fascination with Zann's unusual violin playing.
The unsettling music from Zann’s room draws Ward in, and he becomes increasingly curious about its source. He begins to investigate a mysterious, curtained window in Zann’s room, uncovering secrets far more disturbing than he imagined.
As their friendship grows, so does the tension surrounding Zann and his haunting music. The film explores themes of mystery, darkness, and connection as Ward's investigation unfolds. It questions the limits of human curiosity and the consequences of seeking hidden truths.