Trelkovsky, (Roman Polanski, who also directed), a timid file clerk, moves into a rundown apartment with a history: The prior occupant jumped to her death from the dismal room's window. In the psychotic environment of a dark Parisian building that's filled with odd characters, Trelkovsky feels himself overcome by a kind of madness. His slow mental deterioration compels him to contemplate emulating the woman's final, tragic hours.
Multiple suicide attempts, violent hallucinations, Roman Polanski cross-dressing: in short, this was amazing. And really funny, although I'm not sure if I think that was intentional or not.