Yennai Arindhaal...

Yennai Arindhaal
Teaser poster
Tamil	என்னை அறிந்தால்...
Directed by	Gautham Vasudev Menon
Produced by	A. M. Rathnam (Presenter) S. Aishwarya
Written by	Gautham Vasudev Menon (Dialogue)
Screenplay by	Gautham Vasudev Menon Additional Screenplay: Sridhar Raghavan Thiagarajan Kumararaja
Story by	Gautham Vasudev Menon Script Consultant: Sridhar Raghavan Thiagarajan Kumararaja
Starring	Ajith Kumar Anushka Shetty Trisha Krishnan Arun Vijay Parvathy Nair
Music by	Harris Jayaraj
Cinematography	Dan Macarthur Additional Cinematography: S. R. Kathir
Edited by	Anthony
Production company	Shri Sai Raam Creations
Distributed by	M K Enterprises
Release date	5 February 2015 (2015-02-05)
Country	India
Language	Tamil
Budget	₹50 crore
Box office	₹95 crore

Yennai Arindhaal (English: If You Know Me) is a 2015 Indian Tamil-language neo-noir crime-drama film co-written and directed by Gautham Menon, and produced by A. M. Rathnam. The film stars Ajith Kumar, Anushka Shetty, Trisha Krishnan, Arun Vijay, Parvathy Nair and Vivek. The soundtrack album and background score for the film was composed by Harris Jayaraj. The film was edited by Anthony while Dan Macarthur handled the cinematography. Yennai Arindhaal's story follows the journey of man named Sathyadev, from the age of 13 till the age of 38. It is also the final film of Menon's police trilogy of films that began with Kaakha Kaakha (2003) and continued with Vettaiyaadu Vilaiyaadu (2006). The film was released on 5 February 2015.

Thenmozhi (Anushka Shetty) arrives in Boston to meet her niece. While leaving for Chennai, in the airport, she gets a free upgrade and sits next to Sathyadev (Ajith Kumar). During the flight, she starts vomiting due to overeating and with Sathyadev's help she feels better, so she develops a crush on him. The next day in Chennai, Sathyadev and Thenmozhi are at a cafe, when a criminal named Victor (Arun Vijay) comes to abduct Thenmozhi, but fails due to Sathyadev subduing him.

Then the film goes back to Chennai 1989 (then known as Madras) where Sathyadev's father (Nassar) is killed by a criminal. From there Sathyadev makes a decision and a few years later he is seen in a jail with Victor. With both of their help they escape from jail, get Victor married to Elizabeth alias Lisa (Parvathy Nair), and meet Matthew (Stunt Silva), a criminal. There Sathyadev infiltrates the gang as an IPS officer, kills Matthew and injures Victor. Then in an attempt to stop a gangster he meets Hemanika (Trisha Krishnan) who needs to get to a hospital due to her being pregnant. Two years later, he meets Hemanika and her child Isha (Baby Anikha). After seeing each other for four years they decide to get married with Isha's approval. On the day of their marriage, Hemanika is killed; both Sathyadev and Isha are heartbroken. Years later Sathyadev decides to quit and travels with Isha around India along with his colleague Richard's (Vivek) help. After he returns, his neighbour's children have gone missing and he discovers Victor is now helping his boss, Muruganandham (Suman), stealing organs illegally with foreign doctors to help him. Sathyadev is able to find both the children, and is also able to find their next target, Thenmozhi. Then it goes back to the present where Sathyadev keeps Thenmozhi in their house with Isha.