police officer DySP Murthy who learns from Chokalingam that Mammootty had taken photos of Tony and friends while in the train. He gets the photo from him and are publicly displayed. Mammootty helps Tony and friends to return to Kerala secretly as he believes they are innocent. Back in Kerala, they are confronted by Sunil. Sunil sneaks upon Tony holding a switchblade at the lake where Tony, Kumbalam and Kanjikkuzhi were bathing. Sunil attempts to murder Tony, Kumbalam and Kanjikkuzhi. Tony defeats and subdue Sunil in the fight that ensued. Tony orders Sunil to spill information about Devi's killer. Sunil was actually the lover of Devi and both had planned to elope from the train at Erode, but failed as Sunil could not get out off the train in time during the halt. Devi, with the help of the station master takes a taxi to the next station, Salem, and get back to train. Sunil makes amends with Tony, Kumbalam and Kanjikkuzhi and now all four of them are friends. Also, from Sunil, they learn about Sr. Gloria, who tells that Devi gave her a diary before leaving for Madras. After acquiring the diary from the convent, they come to know that Nair is not Devi's father, but only a stepfather and that he killed her father in her childhood. On learning that Nair might be the murderer, Tony calls Nair by phone impersonating Mammootty's voice and says that he has got the diary and blackmails him to give ₹20 lakh in return for the diary. Tony informs Mammootty and convinces him to proceed with the play. Mammootty and Nair meets and agree to fix the deal on the same train on a Wednesday. Mammootty boards the train at Palakkad on which Nair has already booked an entire bogie. He informs that the diary is not present with him and 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, he along with Mammootty overpower Nair's henchmen. Meanwhile, Nair reenters the train at Salem Jn. and finds that Tony has already entered. Tony attacks Nair and make him confess the truth. Nair reveals that he killed Devi after she caught up the train at Salem, fearing that Devi would inform the police about