Kolaigaran
Kolaigaran () is a 2019 Indian Tamil-language action thriller film directed by Andrew Louis of Leelai fame. The film stars  Vijay Antony, Arjun  and Ashima Narwal, while Nassar and Seetha play supportive roles. The music is scored by Simon K. King. Principal photography of the film commenced on 5 June 2018. The film follows an investigation in which a woman and her mother are suspected of murder after a disfigured corpse is found, while their neighbor claims to have committed it instead, much to the surprise of cops. The film was released theatrically on 7 June 2019. It opened to positive reviews and became a super hit at the box office. The movie is heavily inspired by the 2012 South Korean thriller Perfect Number which was based on the Japanese mystery novel The Devotion of Suspect X which had earlier been adapted in 2008 in Japanese as Suspect X. The movie was also loosely inspired by Agatha Christie's mystery novel  The Body in the Library. Plot 
The movie begins with a murder of a mysterious lady who is killed by an unknown person inside a house. In another scene, Prabhakaran (Vijay Antony) is seen surrendering to the police. The scene shifts to Prabhakaran's past. Prabhakaran and Dharini (Ashima Narwal) are neighbors, and each morning, they coincidentally greet each other as they step out of their homes while stepping out to their respective workplaces. Although Dharini's friend who sees this happen each day warns her to be careful of Prabhakaran as she suspects this as a planned execution, Dharini dismisses her opinion as being paranoid. Meanwhile, a gruesome murder occurs at night in a desolate area in Chennai where a man is killed and burned. The next day, the body is found by the locals, and a crime branch cop named DCP Karthikeyan (Arjun) is assigned to the case. The police were not able to identify the murder victim due to his deformed face; however, Karthikeyan finds the half-burnt tailor tag from the clothes of the victim and assumes that the person is someone from a different city. He starts an investigation on complaints of missing guests at hotels within Chennai, and from the information extracted from the tag, he discovers that the murdered man is Vamsi, who is the younger brother of an influential minister in Andhra Pradesh. Checking on Vamsi's background, Karthikeyan learns that Vamsi is a habitual molester who used to stalk and harass Dharini, leading Dharini and her mother Lakshmi (Seetha) to escape to Chennai without his knowledge two years ago. Karthikeyan starts with his investigation with Dharini and Lakshmi, who admit to their past connection with Vamsi, much to Karthikeyan's surprise. Similarly, Karthikeyan investigates Prabhakaran on the whereabouts of his neighbors on the date of the murder. Meanwhile, Prabhakaran contacts Dharini via his office landline phone and asks her to do as instructed. Theoretically speaking, Karthikeyan firmly believes that the murder has something to do with Dharini and Lakshmi and he also suspects they could not have done it on their own without a male's assistance. During his investigation, Karthikeyan also learns that Prabhakaran is a former Hyderabad-based IPS officer who is renowned for solving murders. However, when approached for help on solving the case, Prabhakaran claims that he can offer no help. This strengthens Karthikeyan's suspicions on Prabhakaran, despite his team's opinions against the idea. In a sudden turn of events, Karthikeyan learns that Prabhakaran has surrendered for the murder. During the course of interrogation, Prabhakaran reveals that he and Dharini are secret lovers. When Prabhakaran learns about Dharini's past with Vamsi, he wants to help Dharini and kills Vamsi without Dharini's knowledge. However, when Dharini was asked about Prabhakaran's story, she claims that she barely knows him, which leads the investigators to believe that Prabhakaran is suffering from a serious case of delusions. To further cement the fact that Prabhakaran is the sole murderer and Dharini and Lakshmi are not, a listening device is found in Prabhakaran's house to prove that it is through this he came to know about Vamsi. The tale takes its turn in the final minutes, and all of the police but Karthikeyan believes that the case can be closed as the murderer Prabhakaran has surrendered. Karthikeyan could not believe that Prabhakaran, a police officer who is specialized in murder cases, could make amateur mistakes when disposing of Vamsi's body. Karthikeyan ponders on his suspicions that the murderers of Vamsi were indeed Dharini and Lakshmi and thus further investigates on Prabhakaran's motive to surrender instead of them. It was found that Prabhakaran was an IPS officer in Andhra Pradesh who lived happily with his wife, Aaradhanaa (Ashima Narwal), who bore a resemblance to Dharini. Unfortunately, she was murdered by Ali (Sampath), an escaped criminal, who considers himself to be Prabhakaran's enemy (as shown in the opening scene). Prabhakaran resigns his job as a police officer and starts to search for Ali, who escaped after murdering his wife. When he learns that the murderer is in Chennai, he moves there to avenge Aaraadhanaa's death. When Dharini and Lakshmi killed Vamsi in self-defense, Prabhakaran, wanting to help Dharini as she resembles his own passed wife, plots and kills his wife's murderer the next day and conceals his body instead of Vamsi to misdirect the case investigators from suspecting Dharini and Lakshmi. Karthikeyan gains a newfound respect for Prabhakaran after learning the truth and decides to keep as a secret. 