Nithya (Shobana) is the deputy commissioner of the city who lives with her Valliyachan (Janardhanan) since both her parents were killed in an accident. She was put on to investigate a corruption case done by the Home Minister and his friend a business man called Rajan Phillip (Cochin Haneefa). Unknowingly she was helped in the investigation by a criminal nicknamed Superman (Jayaram).
Professor Phillip Brainard, an absent minded professor, works with his assistant Weebo, trying to create a substance that's a new source of energy and that will save Medfield College where his sweetheart Sara is the president.
Three detectives in the corrupt and brutal L.A. police force of the 1950s use differing methods to uncover a conspiracy behind the shotgun slayings of the patrons at an all-night diner in this lush tribute to tough film noir crime films.