Satya and Kiruba are friends. Satya is reckless and gets into drinking and violent fights whereas Kiruba studies hard to become a Sub-Inspector. Tables are turned when Satya becomes a Sub-Inspector.

Ekambaram is a don in Thanjavur who smuggles expensive idols and artifacts. Sundaram is one of his worker and a long time friend. Sundaram has a son, Kathir, who is a cab driver in Chennai. One day, Kathir once goes to a girl named Viji for her hand in marriage, only to be rejected by her father, as he comes to know that Sundaram’s father works for the local don, Ekambaram. In the ensuing conflict, Kathir slaps Viji’s father and leaves. However, he still proposes to Viji.

After a fifteen-year-old is brutally beaten up by High School bullies, his wish for revenge unknowingly unleashes the Terror of Halloween.

The movie is a psychological thriller based on a link between a CBI officers private life and a serial murder case he is handling.

College goer Karunakaran (Arulnidhi) finds it difficult to adjust with the society that he lives. As a result, he is unable to control his anger and ends up with trouble. His unpredictable behavior becomes a constant worry for his mother (Sujatha Sivakumar) and brother. A series of incidents force him to leave his hometown Madurai and end up in Chennai. Despite scoring high marks in school, he joins a local arts college in the city and stays in a hostel, where trouble begins. Meanwhile, while traveling from Bangalore to Chennai, Assistant Commissioner Marimuthu (John Vijay), Inspector Rajendran (Madhusudhan Rao), Sub-Inspector Selvam (Balakrishnan), and Sgt/Head Constable Perumalsamy (Krishnamurthy) witness a car accident. When they are about to take the victim (son of a Bangalore-based business tycoon) to a nearby hospital, they come across a huge stash of cash. The policemen kill the half-dead victim and flee to Chennai with the money. The sincere police officer Palaniammal (Uma Riyaz Khan) takes up this case. A cluster of lies, ego clash at the hostel, and family’s ignorance brings Karunakaran into this crime plot. The rest is a racy rollercoaster ride that forms the climax.

Sanju (Sundeep Kishan) is a college going student who falls for a girl Tanvi (Regina Cassandra) at first sight. They get along over a period of time but unsure of the advancing in their relationship because other person might not be perfect.

Gandhi Babu (Natraj) is a skilled conman. He dreams up ingenious scams and executes them perfectly. He sells ignorant people ordinary snakes, claiming they are exotic and will fetch crores in the international market. He promotes a nonexistent ‘multilevel marketing’ company with its controversial chain referral schemes promising a BMW car within the year. The climax has him pulling off ‘the rice pulling scam’, one of the most high-profile scams of recent times. About 40 minutes into the film, Gandhi is arrested with multiple cases filed against him. The money he has scammed over the years comes to his rescue, and he is released, but he continues to manipulate everyone. He believes that if a person is foolish or greedy enough to be duped, then the person is to be blamed. He argues that every election voters are conned by the candidates who promise them the moon, but never come through. Banu (Ishaara Nair) is from a poor family. She comes to work for Gandhi and falls for his charms. Gandhi, despite having a soft corner for her, money is his first priority. Because of this, he abandons Banu. Some of his friends betray Gandhi, and he is beaten to a pulp. Banu looks after him for some time, and they get married. She becomes pregnant. Towards the end of the film, a group of people whom Gandhi had tricked capture him. They threaten him to settle their lump sum of money. He performs a final heist to hand over the money to them. The passage of money results in a tussle. Gandhi kills them and returns to his wife and child with the money. Finally, the look on her face makes him realize the value of life, and he leaves the money to the police custody.

A robbery takes place where European printing plates are stolen. A man decides to use this to his advantage and seek revenge for a past matter involving the death of his wife.

Muralipandian (Vikram Prabhu) is the only son of Chellapandian (Sathyaraj), a disabled policeman who is now working in the State Crime Records Bureau and expresses a desire to see his son in the police one day. However, Murali is against becoming a policeman due to an incident which happened in his childhood; when Chellapa lost his leg during police duty, his wife fell down the stairs on hearing the news, leading to her death and left a crippled Chellapa to single-handedly look after the young Murali. His ambition is to become a bank manager, and he manages to get an interview for the same in a bank. While on a pilgrimage, Murali meets Ambujam (Monal Gajjar), a young doctor who is travelling with her chaperone, who is her grandmother Aishwarya (Kovai Sarala). Ambujam initially thinks ill of Murali due to unsavoury incidents which occur between them during the journey, but after she finds out about Murali’s true character and he helps her Aishwarya recover from dehydration, she falls in love with him. She expresses a distaste for marrying policemen, which impresses Murali.

When mobile networks stop functioning due to a solar flare, Vasanth, a geek, tries to restore them. But a deadly bomb will be activated if the connection is resumed.

The movie revolves around the murder of a delivery boy. And more murders happen. After some serious probing, it is suspected that a huge mafia network behind these murders. How the culprits are tracked down is the rest of the movie.

During the journey, he meets Saroja (Keerthy Suresh) and falls in love with her in the first sight. She is the make-up artist of the actress Srisha, and she wants to become a successful singer. Poochi tells about Saroja to Vairam who promises to help him woo her. Poochi then devises a plan, and makes her talk on the phone to a great poet Vairamuthu, who is actually Vairam. However, he soon realises that Saroja is not good at singing from any angle though continuing to support her. Saroja remains close to Poochi as she wants to enter the singing industry without knowing the true fact.