An undercover cop goes to find and kill a crime lord. However, when he realizes that the crime lord’s business intentions are good and he has his own challenges, he needs to decide his next step and help the crime lord change his life.

Ramarao is a fair government officer who bends the rules when it comes to fighting the lapses in the system. When transferred to his own village, situations take him on a quest where he faces challenges and has to take on evil.

Raghava (Lawrence Raghavendra) is a typical jobless youth who spends his days playing cricket with friends. He suffers from an irrational fear of ghosts and retreats to the safety of his home after sunset. His fear is so great he prefers to sleep with his mother (Kovai Sarala) and have her accompany him to the bathroom at night. This creates a major annoyance in the household, including Raghava’s brother (Sriman), sister-in-law (Devadarshini), and their children.
One day, Raghava and his friends are forced to abandon their usual cricket ground and find a new one; they unwittingly select an abandoned ground which is rumored to be haunted. A bizarre weather change scares them away. Raghava brings home his cricket stumps, which have been stained with blood from a buried corpse in the ground.

Suriya, a sub inspector happens to investigate a theft case that takes place in an architect Siva’s house. Right from the moment Suriya sees Siva’s wife Ramya. Now how Suriya takes revenge against Ramya and does he succeed in it?

Aryan is a narcotics officer entitled with making the city a drug free zone. One day, people very close to Aryan get murdered one by one. He feels that this might be the work of the mastermind who is behind the entire distribution network.

The film opens with the ageing gangster, Singaperumal, forcing himself on a young girl, Subbu. He is unable to perform, and vents his anger by slapping the helpless Subbu. Singaperumal is the grand don of crime in Madras. His lieutenant, Pasupathi, brings a proposal. A large stash of cocaine, worth about ₹ 2 crore, has entered the city. The guy bringing the stash wants to sell it for ₹ 50 lakh. Pasupathi sees the immediate easy profit, as well as the long term benefit (to control the cocaine market with such a large supply) and the recognition that they are able to pull off such a deal. The drawback is that the stash really belongs to their arch-rival Gajendran. Singaperumal knows that Gajendran is a vicious and unpredictable adversary, and the venture is risky and likely to become messy. He decides to pass. Pasupathi dourly suggests Singaperumal is getting old and rusty. He asks Singaperumal to loan him the ₹ 50 lakh so he can do the job himself. Pasupathi is prepared to face the risks, and in return for the loan, he offers Singaperumal a cut of the profits. Singaperumal agrees to the loan, but, instead asks Pasupathi to first get the stash and then think of the profit distribution. The money for the loan is brought to Singaperumal.

Regina is an upright and straightforward girl whose world revolves around her father. However, things change when her father gets killed. She soon gets married to Jo, an employee at a Private bank. What will happen when Jo dies too?

Surya is a rich spoiled brat, who is also a playboy. He has many girlfriends, whose names are saved in his phone as noodles, lemon, coffee etc. On his way to pick one of his girlfriends, he is kidnapped. He wakes up in a small confined box, with a phone inside. Later, Surya gets a call from the kidnapper. Surya demands the terms to set him free. The kidnapper asks him to cut off his private part within an hour’s time.
An hour later the kidnapper calls back but Surya has not done as he was instructed. Surya begs the kidnapper for his release. The kidnapper asks if Surya remembers the sins he has committed and how many women he has womanised so far. Then Surya remembers the name of a girl named “Kousalya” , an innocent poor girl whom he had cheated in the name of love and recorded their intimate video. After which the girl commits suicide.

Madhan Kumar (Silambarasan) is a well-respected and well-educated Chartered Accountant by profession, who lives in Chennai and also learns music as part-time in a musical college. Mythili (Jyothika) also learns music from the same college. Mythili gets scared seeing Madhan because once she had a dream of getting raped by him. Later on, she realizes his kind nature and they both become good friends.

The movie begins at present day with Saket Ram (Kamal Haasan), an 89-year-old Hindu man at his death bed in Madras. He is being taken care of by his grandson Saket Ram Junior, a famous novelist who writes historical fiction, and their family doctor, Munawar. Ram Jr. explains how he grew up listening to his grandfather’s stories. He then narrates one of his grandfather’s strangest stories that he plans to use for his next novel. As Ram Jr. narrates the story, Ram is reminded of it.
The scene reverts to the 1940s, when he and his good friend, Amjad Ali Khan (Shah Rukh Khan) are archaeologists working together under their boss, Mortimer Wheeler, in Mohenjo-daro in the Sindh province in what was then North-West India. Relations are pleasant between the Indians and the English. Saket and Amjad do not approve of partition and the creation of Pakistan.

The movie opens to a prologue, where King Parasbaram (Radha Ravi), ruler of a small rival kingdom and the nine ministers of the great Empire of Vikata Nagaram are on their way to a Chinese consulate’s mansion. They are warmly welcomed by General Wang (Wilson Ng) and courtesan Hong (Vivienne Tseng) once they reach there. The Chinese consulate, headed by Chao Gong Gong (Nickson Cheng), wishes to engage in trade with the people of the Kingdom of Vikata Nagaram and reap the benefits. Thus, the ministers strike a deal with Parasbaram and the Chinese to help them after being promed a huge share of the benefits. The Foreign Affairs Minister of Vikata Nagaram, Nandivarma Rayar (Joe Malloori) objects to this, saying that he doesn’t want to betray the King and his people for money. Chao Gong Gong then orders courtesan Hong to kill him with a poisoned needle from her hair.

In 1947 a Gandhi follower and a freedom fighter were brutally attacked. Due to unavoidable circumstances, the freedom fighter son gets trapped in the mafia world and the story revolves between 1942 to 1986.