When a struggling freelance photographer discovers a secret window in his apartment that offers a clear view of the rooms in a shady hotel across the lane, he is lured by the dangerous obsession of voyeurism and, subsequently, blackmail. But one day, when he sees a husband murder his wife in a fit of rage in one of the rooms, the photographer turns to detective Janardan Maity to confess his own crimes, so that the killer can be brought to book