Arrambam (English: Beginning) is a 2013 Indian Tamil action film directed by Vishnuvardhan. Produced by A. Raghuram and co-written by Subha, the film features Ajith Kumar and Nayantara in the lead roles and Arya and Taapsee Pannu in supporting roles. While the score and soundtrack of the film were composed by Yuvan Shankar Raja, the cinematography was handled by Om Prakash and editing by A. Sreekar Prasad.
Following a six-month long pre-production and the official announcement of the project in May 2012, filming commenced in June 2012 and continued for the next 15 months. Majority of the filming happened in Mumbai. Other locations included Chennai, Bangalore, Dubai, Hyderabad, Mahabaleshwar, Jaisalmer, Leh and Ladakh. The film was not titled until it entered post-production and was mostly referred to as Thala 53 or Valai, a supposed working title. The film was released on 31 October 2013.
The film starts with Ashok Kumar aka AK (Ajith Kumar) setting bombs in three places and informing the police about them. Before the police arrive, the bombs are set off. He along with his lady love Maya (Nayanthara), both threaten her old collegemate hacker Arjun (Arya), who starts hacking one system after the other. AK then threatens Sridhar Raghavan (Aadukalam Naren) by trying to kill his baby so that he can extract the truth about black money. AK murders him in a fit of rage. Arjun, who is particularly irritated by the things happening around him, complains about the misdeeds of AK to Inspector Prakash (Kishore). When AK gets closer to achieving his goals, Arjun gives him away to the police and both are arrested. Arjun is later released after his true identity is revealed.
Later, Maya, who had escaped from the scene, tracks Arjun and Anita and tells them AK’s original motive. AK is revealed to be a former member of an Anti-Terrorist Squad, who is on a mission to expose a scam regarding faulty bulletproof jackets, that are provided to security forces, which resulted in many bloody deaths including his best friend and colleague, Assistant Commissioner Sanjay (Rana Daggubati). It turns out that Home Minister Mahadev Rane (Mahesh Manjrekar) and his associates Milind Virekar (Atul Kulkarni) and Ramya Radhakrishnan (Suman Ranganathan) are the people involved in the scam. Ramya kills Sanjay’s pregnant wife and her parents by poisoning while Maya, who is also poisoned, and Mango (Five Star Krishna), who was placed on a railway track, survive the attack. Arjun, who hears the flashback, decides to help them.