Arumugam (Bharath) is a good Samaritan who makes a living selling Idli’s on roadside platform shop along with his father (Ilavarasu), sister (Saranya Mohan) and sidekick (Karnas). Arumugam is in love with his childhood sweetheart Yamini (Priyamani) His best friend is the rich kid Karthik (Satya) whose sister is an arrogant tycoon Malini (Ramya Krishnan). She and her uncle (Mahadevan) hates Karthik’s deep bonding with Arumugam, who she finds to be below her stature. Malini, through her machinations is able to separate the friends and bring Arumugam to the streets. Our hero after his mother’s (Seetha) grave is bulldozed and his sister humiliated, vows to bring Malini to the streets. And like you have seen in hundreds of earlier films the hero due to his hard work and smart moves becomes the richest man in the town and takes his revenge.

Karthik’s wife Priya is being harassed by a police officer, due to which she ends her life. However, Karthik is held responsible for her death and imprisoned, where a social worker offers to help him.

Vivek (Bharath), Aravind (Arun), Eshwar (Arjun Bose) and Shafeek (Padma Kumar) are four angry engineering students who cannot stand the corruption in society. They take the law into their own hands and they form the secretive clique called 4 The People (their dress code is black and everything about them is black) that takes out corrupt officials. They have a website where the public can lodge their complaints. Soon the police are on their track. A young cop (Narain) is in hot pursuit of the gang. In a racy climax the foursome attempt to kill the Minister but fail. Seeing the brutality of the police the students come to the support of the foursome. One of the students kills the minister and is joined by three more students. They escape due to the support of students. The revolution continues.

Muniyandi (Bharath), a third year undergraduate zoology student and the son of Muthumani (Ponvannan), who happens to be student canteen contractor of the same college. He meets Madhumitha (Poorna), the demure young daughter of a local bigwig Ramaiyya (L. Raja), who gives first priority only to the members of his caste. Madhu makes a coquettish play for all of Muni’s friends including Sorimuthu Ayyanar (Vadivelu), a part-time witch-doctor, who is also peon of the college, dressed complete with bells and saffron cloth regalia, but hits it off with him first. Following a heated skirmish in the caste-dominated college elections, the two fall in love. But everything goes topsy-turvy when, once Madhu’s marriage is arranged, she turns around and says that she was never in love with Muni in the first place. Furious, Muni thrashes her with his slippers and sets fire to her father’s coconut grove. Though she never reveals to this incident to anyone, Muni, on the other hand, discovers the secret behind his brother’s death. Muni’s brother was killed when he tries to help his friend who is in love with a girl of the other caste. Muni participates in college elections to go against Madhu’s words. On the day of nomination, Muni realizes that Madhu loves him truly, but had reverted from her feelings due to the request from his father to save his life. Muni convinces college students from conducting election in college and put a stop caste game in college. Ramaiyya and the other caste head were supposed to be killed by Raju (Muni’s brother’s friend and the old girl’s lover), which Muni thwarts. Finally, Muni, with his father’s acceptance, returns to Madhu (who was waiting for him near the temple) and unites with her.