Oru Kaidhiyin Diary
Oru Kaidhiyin Diary is a 1985 Indian Tamil-language action thriller film directed by Bharathiraja and co-written by K. Bhagyaraj. The film stars Kamal Haasan, Radha and Revathi. It was released on 14 January 1985, and completed a 175 day run in theatres, becoming a silver jubilee film. The film was remade in Hindi by Bhagyaraj as Aakhree Raasta and in Telugu as Marana Homam.
Plot
David, a prisoner, tries to escape from prison, but is caught and gets his sentence increased multifold as a result. He gets released from prison after 22 long years and visits his dear friend Velapan. A flashback shows that David was married to Rosy and had a child called James.David is politically active in the grassroots movement and idolizes powerful politician Suryaprakasam, who is smitten by Rosy. Suryaprakasam concocts a plan to get David detained by the police, and uses the opportunity to sexually molest Rosy. Rosy then commits suicide by hanging herself and leaves her husband a handwritten note with the details. David confronts Suryaprakasam at his birthday function and demands his arrest. But Suryaprasakam escapes with her from police Inspector Viswanathan and Dr. Unnikrishnan. All 3 testify in court and frame David for murdering Rosy.
Upon release from prison, David sees that Velapan is a wealthy man, educated David's son, and raised him in a righteous way. David's son James is now called "Shankar" and is a well-respected and courageous police inspector. David is upset at this news, knows he cannot count on Velapan and his own son, and vows his revenge against the trio who framed him by himself, without anyone's help.
Before embarking on his mission to avenge the trio, David goes to his church and preemptively confesses to the priest that he would kill 3 people who informs the police. David tricks his way into Police Headquarters by posing as a priest who knows about the would-be killer and victims, and insists that he will only discuss matters with the now Superintendent of police (India) Viswanathan. Although Shankar is suspicious and assigns a policeman to watch David while verifying his identity, David successfully manipulates Sharadha, the love of Shankar and the daughter of RajaManickam, the Deputy Inspector General of Police to distract the policeman and succeeds in entering SP Viswanathan's office. He identifies himself and reminds the SP of his horrific betrayal and at gunpoint makes him call his friend, Dr. Unnikrishnan. He then sets up a Rube Goldbergian contraption—a hanging trap, tied to the office door. Dr. Unnikrishnan comes to the SP's office as planned and when he opens the door, SP Viswantahan is hanged and kicks out in the throes of death, watched by the aghast Dr. UnniKrishnan.
Shankar investigates the clues David left clues in a tape-recorded conversation at SP Viswanathan's office and identifies the other two victims as Dr. Unnikrishnan and Suryaprakasam. Undaunted, David then takes Sharadha hostage against his safety and kills Dr. Unnikrishnan with a telescopic rifle, despite strong police protection—and escapes again. David is supported by Sharadha, who learns about and sympathizes with his revenge and wife's molestation. Sharadha hides David in her house basement, which is free from police suspicion, being the DIG's house.
During the investigation, Shankar finds out David and his dad Velapan are long time friends and confronts him. Velappan gives Shankar David's diary which outlines all events in David's life until he went to jail. Although Shankar is upset and enraged at Suryaprakasam, he is persuaded by DIG RajaManickam to do his duty as a policeman and not give room to sentiments. Suryaprakasam returns from this foreign trip and organizes a rally. Police unwittingly lay out their plans to protect Suryaprakasam at the DIG's house, with David listening from the basement. He then disguises as the statue that Suryaprakasam is planning to unveil and kills him during the rally. Shankar shoots David, who dies happily that his mission is accomplished.