Film is slow in bits and parts where some scenes are dragged unnecessarily. Some scenes are written with little melodrama and humor keeping in mind that it is a feature film. Not a single moment in the film where the film becomes bore or unbearable.
The biggest victory of the film is that it does not look like a television crime series at all. With limited narration everything is explained with proper details without increasing the run time of the film.
Performances of the entire cast in the film is the major plus of the film. Kay Kay Menon is brilliant as a CBI officer. He proves that there is no one in the industry who can perform such characters like he does. Ashish Vidyrthi, Meeta Vashisht, Bikramjit Kanwarpal and Ashwini Kalsekar are superb in their respective roles. Surprise package in the film is Tisca Chopra who makes you skip a heart beat in the climax. She has given an unexpectedly stunning performance especially the climax. One major reason for the film being so good are the performances in the film.
Manish Gupta deserves all the appreciation for Rahasya. His direction makes this film interesting. His writing keeps your eyes glued to the screen and editing of the film keeps you on the edge of your seat.
Rahasya does not give you a single chance to question. The film is not to be missed. Along with the murder case it also showcases the darker side of upper middle class society. This one is absolutely recommended.