Ramana ,a college professor attempts to end corruption by creating a group called ACF.

Dheena works for his brother Adhikesavan, a gangster, and is very close to him. However, things turn sour between them after a misunderstanding leads to the death of their sister.

Ramanaa begins with the abduction of fifteen District collectors. After three days in captivity, fourteen officers are released, but one is murdered. The police find a tape recording and a file on the dead officer’s body that provide significant evidence concerning the kidnapping and subsequent murder. The file suggests that the crimes were committed by members of the self-proclaimed “Anti-Corruption Force” (A.C.F.), a citizen militia seeking to eliminate corruption through vigilante acts. The militia, acting as a kangaroo court, “sentenced” corrupt officials in the area to death, beginning with the captured revenue officers who were apparently engaging in criminal activity.

Jeevanandham is a social activist who fights against a monstrous MNC company to restore farming. Because of destiny, Kathiresan impersonates Jeevanandham and leads the war.

Sundar Ramaswamy is a highly successful non-resident Indian businessman based in the United States of America, referred to as a “corporate monster” due to his ruthless business dealings. He arrives in Chennai to cast his vote in the Tamil Nadu Legislative Assembly election. However, he finds out that someone else had already voted in his name. Sundar approaches the Tamil Nadu State Election Commission and demands a stay on the election result for his constituency, an annulment of the fraud elector’s vote and the ability to legitimately cast his vote, to which they agree. Sundar raises awareness among the public regarding fraud voting and finds that many people too faced a similar problem to his when trying to vote.

A police officer on a chase to hunt down a dreaded gangster for fulfilling his own secret agenda.

Chitra (Nayantara), a medical student and her friends are working on a project about the human brain. She wants to investigate the curious case of Sanjay Ramaswamy (Suriya), a (former) notable Chennai based businessman, who is reported to have anterograde amnesia. Her professor denies access to Sanjay’s records as it is currently under criminal investigation. Chitra, nonetheless, decides to investigate the matter herself.
Sanjay is introduced as he brutally murders a man. He takes an instant picture of the man, and writes on it “done”. Sanjay has anterograde amnesia; he loses his memory every 15 minutes. Sanjay uses a system of photographs, notes, and tattoos on his body to recover his memory after each cycle.

A genetic engineering student tries to bring back the skills of a legend of the past and use his skills to save India from a deadly virus attack by China.

An army captain visits Mumbai to be with his family and find a suitable bride. However, an explosion in the city sets him off on a mission to find and disable a terrorist sleeper cell in the city.

Shiva (Mahesh Babu), an officer in the Intelligence Bureau office, spies on people’s calls and messages to help them if needed. He developed a software to listen to the needing ones by tracking their phones. On the night of 16 March, he listens to Charlie/Shalini (Rakul Preet Singh) talking about her wish on getting 98% in her exams from 96% to get a USA scholarship with her friend. In order to do that, she decides to get concentration by dating with a guy. Shiva follows her, and she starts to fall in love, but he does not.
On the night of 28 April, he listens in on a young girl asking her friend for help as she is alone in her house and scared because there is no electricity in her house whilst everyone else on her street has it. Shiva sends his friend, new police constable Renuka (Himaja), to help the girl. However the next day, a news channel declares that the two women had been killed. They were undressed, chopped into different pieces, and were mixed together. Shiva goes to the crime scene and finds it has been a brutal murder. He resigned from his job stating, “I didn’t help them and I should’ve never sent out Renuka,” but his father (Jayaprakash) encourages him to find the murderer. To find out who murdered them, he sets out to ‘spy’ the girl’s chats and whereabouts.