Thadam () is a 2019 Indian Tamil-language crime thriller film written and directed by Magizh Thirumeni. Produced by Inder Kumar, the film stars Arun Vijay in a double role along with Vidya Pradeep , Tanya Hope, and Smruthi Venkat . The music was composed by Arun Raj, with cinematography by Gopinath and editing by N. B. Srikanth. It marks the Tamil debut of Tanya and the film debut of Smruthi. In the film, police officers try to solve a murder case involving lookalike suspects arrested on the basis of a pictorial evidence.
Thadam was released theatrically on 1 March 2019, opening to critical acclaim with praise for Arun Vijay's performance and the writing. It was commercially successful, becoming one of the highest-grossing films of the year in Tamil Nadu.
Plot
Ezhil, is a civil engineer from IIT Madras, while his lookalike Kavin, is a gambling thief who deceives people along with his sidekick Suruli. Ezhil's love interest is an IT girl, Deepika, while a girl named Ananthi, loves Kavin, unaware of his real identity. One day, Kavin tries to help Suruli pay his debt by extracting money from Ananthi through lies, but she helps him in spite of knowing the truth. After taking the money, Kavin is enraged, and so is Ezhil after a party. That night, one of them breaks into a house and attacks the owner Akash, stabbing him to death. The next day, Kavin frees Suruli by paying his debt and wins Ananthi's trust by returning her money and telling her the truth. However, as the investigation of Akash's murder proceeds, a selfie clicked by a couple nearby is found with either Ezhil or Kavin in it.
Both Ezhil and Kavin are brought in and investigated without their knowledge of each other's existence. Gopalakrishnan, an inspector who shares an old rivalry with Ezhil, tortures him. Ezhil reveals his car broke down, and a call taxi driver helped him, as he didn't have the repair kit. SI Malarvizhi interrogates Kavin, who on the other hand, cites various laws to escape torture. She reaches out to Akash's friend and shows him the photograph of Ezhil/Kavin, but he refuses to recognize him. She also questions Suruli and tells him not to leave the city without permission, but he secretly escapes. Malarvizhi then learns of the rivalry between Ezhil and Gopalakrishnan; Ezhil helped the latter's daughter elope with her lover, much against her father's wishes. The forensic expert informs Malarvizhi about a hair sample recovered from the crime scene and how it doesn't match anyone else in Akash's home.
At the police station, Ezhil tries to escape but is interrupted by Kavin. The two violently fight, hurting everyone and vandalizing the station in the process. Kavin and Ezhil are revealed to be identical twins after their DNA is found identical, and both confess about the same; they parted ways when their parents divorced. Kavin went with his mother, who used to gamble a lot but wouldn't refuse anyone who asked her for help, and one day tried to convince him that she'd give up gambling but instead committed suicide. Kavin was then taken in by his father but got into a violent fight with him and Ezhil. Both of them were admitted to a mental institution as a result. Growing up as their father died, Kavin became interested in studying the law but left studies due to his lack of college ethics. One day, when Kavin came home and left in front of Ezhil, whose ring for Deepika went missing, Ezhil reported him to the police.
The police beat up Kavin, who himself told Ezhil to look for the ring in the drawer. Ezhil realized his mistake, but Kavin, who came home for a photo of their mother, vowed to seek revenge. On the other hand, Gopalakrishnan still wants to frame Ezhil, but the call taxi driver who helped Ezhil confirms he was really stuck on the night of the murder. It also proved that Kavin paid Suruli's debt with gambling money he won after playing all night. The sessions court, weeks later, acquits both Kavin and Ezhil in order to protect the innocent one from punishment. Gopalakrishnan retires without getting his revenge. Months later, while shifting the items of the Police station, Malarvizhi gets a glimpse of Deepika's photo in Akash's case and calls Akash's friend to inquire about the girl he was infatuated with and is shocked to learn that it was Deepika. Ezhil is finally revealed to have murdered Akash for drugging, kidnapping and raping Deepika to death out of his childhood lust. Akash also bribed the police to avoid charges. When Kavin found out about Akash's murder, he helped Ezhil by getting officially arrested himself as well to throw off the police.