No.20 Madras Mail

No.20 Madras Mail is a 1990 Malayalam actioncomedy film directed by Joshiy, starring Mohanlal in lead role along with Jagadish, Manianpilla Raju, Mammootty, M. G. Soman, and Ashokan in supporting roles.This film was remade in Hindi as Teesra Kaun by Partho Ghosh with Mithun Chakraborty.The film follows the mystery behind the murder of a young woman in a train journey between Thiruvananthapuram to Madras. Almost half of the film is shot inside the train.

In the morning, as the train reaches Madras, Devi is found murdered in the toilet. Suspicion lands on Tony and friends and they run away from the spot in fear. The investigation is carried out by the Police led by DySP Murthy V.K.Sriraman who comes to know via TTE Chokalingam that Mammootty has taken photos of the suspects while in the train. He visits Mammootty and gets the photos. Tony and friends seek Mammoottys help and he helps them to return to Kerala secretly. Back in Kerala, they are confronted by Sunil, who was actually the lover of Devi. Both had actually planned to escape from the train at Erode, but was failed as Sunil could not get out off the train in time during the halt . Devi, with the help of station master had then taken a taxi to the next station Salem in order to get back in the train. Also, from Sunil, they learn about Sr. Gloria Sumalatha, who tells that Devi gave her diary before leaving for Madras. After acquiring the diary from the convent, they come to know that R.K Nair is not Devis father and that he is the one who killed her father in her childhood. On learning that RK Nair might be the possible murderer, Tony calls RK Nair by phone impersonating Mammoottys voice and says that he has got the diary with him and blackmails him to give RsLakhs in return for the diary. Tony tells this to Mammootty and convinces him to proceed with the play. Mammootty and RK Nair meets and agrees to fix the deal on the same No 20. Madras Mail onDecember. Mammootty boards the train at Palakkad on which RK Nair has already booked an entire bogie. Mammootty says that the diary is not present with him and he would hand it over at Salem when Tony joins the train. Nair leaves the train at Erode Junction railway station and goes to Salem station via taxi to find Tony but Tony enters the train in between and with Mammoottys help they power down RK Nairs henchmen. Meanwhile Nair renters the train at Salem Jn and finds that Tony has already entered. Mammootty

Source: Wikipedia