Thadam

Ezhil, is a civil engineer while his lookalike Kavin, is a gambling thief who deceives people along with his sidekick Murali. Ezhil's love interest is Deepika, while a girl named Ananthi, loves Kavin, unaware of his real identity. One day, Kavin tries to help Murali 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 of 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. Kavin, on the other hand, cites various laws to escape torture. Sub-inspector Malarvizhi, is assigned to solve the case. 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 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 asks her 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. 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 murder. It also gets proved that Kavin paid Murali's debt with gambling money he won after playing all night. The court acquits both Kavin and Ezhil in order to protect the innocent one from punishment. A disappointed Malazvizhi later calls Akash's friend to inquire about the girl he was infatuated to. Learning it was Deepika, she is shocked. Ezhil is finally revealed to have murdered Akash for drugging, kidnapping and torturing Deepika to death out of his childhood lust, while Kavin found out about Akash's murder and helped Ezhil by getting arrested. Later, Kavin meets Ezhil on the highway and explains how Malarvizhi can't reopen the case as she created a fake witness to help Ezhil, and could herself get into trouble. Ezhil hands him over a photograph of them with their mother and tells him he is going to Mumbai, and later to Copenhagen, never to return. Having sold all of his property in India, Ezhil gives 50% share to Kavin as a tribute. After his marriage with Ananthi, Kavin realizes his lack of trust in his mother prompted her to kill herself. At the end, one of the investigating officers in a documentary shooting calls the case unprecedented, before someone tells him similar cases occurred in other countries as well.

In March 2017, Arun Vijay revealed that he would next work on a film directed by Magizh Thirumeni, which marks the second film for the duo after Thadaiyara Thaakka (2012).[10] Produced by Inder Kumar, the film was launched in April 2017 at Chennai.[11][12] Arun Vijay was reported to be playing a double role, while the film would be based on a real life story.[13] The film has three heroines, Tanya Hope, Vidya Pradeep and Smruthi Venkat.[14] Arun Raj was selected to compose the music for this film, marking his first collaboration between Magizh Tirumeni and Arun Vijay. Gopinath and N. B. Srikanth were signed on to be the film's cinematographer and editor.[15][16] FEFSI Vijayan and Meera Krishnan were also cast in the film before the film entered production in June 2017.[17][18]

Sify stated 3.5 out of 5 stars stating "The presentation is smart and stylish. An engaging whodunit thriller from the word go. The biggest strength is Arun Vijay and his convincing performance as Ezhil and Kavin".[19] The Times of India rated 3.5 out of 5 stars stating "Thadam has an intriguingly written flow of events which begins from the pre-interval point and maintains the suspense factor till the end".[20] Behindwoods rated 3 out of 5 stars stating "Thadam's intriguing screenplay especially in the second half makes it an engaging investigative thriller that should not be missed".[21] The Hindu staed "Thadam by Magizh Thirumeni is an effective murder mystery involving identical twins".[22] Film Companion rated 2.5 out of 5 stars stating "The cinematographer keeps throwing in slightly angled frames, which give the sense of a dual reality: one normal, one skewed. We think we know who did it — but do we?"[23] India Today rated 2.5 out of 5 stars stating "Director Magizh Thirumeni's second film with Arun Vijay, Thadam, deals with a sensitive and intriguing murder mystery. But the screenplay is messed up and filled with spoonfeeding moments, says our review".[24] IndiaGlitz rated 2.75 out of 5 stars staing "Go for this murder mystery/psychological thriller film that is different from the usual fare".[25] The Indian Express rated 3 out of 5 stars stating "At first glance, Thadam, inspired by real events, comes across as a pretty straightforward urban thriller. But as the layers peel, you discover it is cleverly written—in parts".[26] Firstpost rated 3 out of 5 stars stating "Thadam is an out-and-out Arun Vijay film. A well made thriller which takes the audiences by surprise in its climax with some twists and turns".[27] Deccan Chronicle rated 3.5 out of 5 stars stating "Barring couple of dull moments, Thadam is a well-written engrossing thriller worth a watch".[28] The News Minute rated 3 out of 5 stars stating "The film has a deceptively simple storyline but the treatment makes all the difference".[29]

This film's soundtrack is composed by Arun Raj making his debut as a music director. Lyrics are written by Arun Raj, Madhan Karky, Thamarai, and Magizh Thirumeni

Thadam grossed Rs 2.3 cr in its third weekend, taking its estimated cumulative gross in Tamil Nadu to Rs 16.4 cr at the end of 20 days.[30]

• Thadam at IMDb