When an unexpected house call leads Dr. Beer to Speckstein's apartment, he finds himself in the bedroom of Zuzka, the professor's niece. Wide-eyed, flirtatious, and not detectably ill, Zuzka leads the young doctor to her window and opens up a view of their apartment block that Beer has never known. Across the shared courtyard, there is nine-year-old Anneliese, the lonely daughter of an alcoholic. Five windows to the left lives a secretive mime who comes home late at night and keeps something - or someone - precious hidden from view. From the garret drifts the mournful sound of a trumpet player, and a basement door swings closed behind the building's inscrutable janitor. Does one of these enigmatic neighbors have blood on their hands?