Sami Srinivasan (Srikanth), a Brahmin boy, and his friend Karunakaran (Vishnu) grow up in the Royapuram slums and attend the same school. Karuna is a rough and tough boy, but Sami is bit naive. They are close buddies. Once, they see their class teacher Roja (Pooja Umashanker) being brutally murdered before their eyes by a gangster. Dejected at local police not taking any action, Karuna kills the gangster but gets caught by cops. Sami tells the police that Karuna committed the murder. Though both are bailed out of trouble, enmity brews between them. As years roll, hatred increases: Sami is against Karuna. Trouble erupts when Sami loves Karuna’s sister Malar (Poorna). In the meantime, Shruthi (Poonam Bajwa) loves Karuna. What happens between the two forms the rest of the film.

Ajay Raj, Ganesh and brothers Jagapathi Babu and Ram Babu are close friends who spend a lot of time together in Chennai. Ajay is a television actor, Ganesh is a fun-loving engineering student who falls in love with every woman he sees, Jagapathi Babu is an engineer who is married and has a six-year-old daughter, and Ram Babu is Jagapathi’s younger brother who lives with him.
Ram is in love with Pooja, but before he has a chance to tell her, Pooja tells Ram that she is in love with Ajay. Pooja and Ajay eventually get engaged, leaving Ram heartbroken. He soon forgets his grief and has a good time with Ajay, Ganesh, and Jagapathi.

Over the course of one night, a car ride connects a string of people.

Sunderrajan aka Sura (Shiva) comes to Chennai from Coimbatore on his way to Saudi Arabia. He is received by Marthandam (S. P. B. Charan), a veterinary doctor who is going to marry his sister soon. After the travel agent informs Sura that he cannot taste liquor or women in Saudi, he and Marthandam go to a wine shop to have the last gulp. It is a dry day thanks to elections. Sura is determined to taste the ‘quarter’ and starts his journey to various places in Chennai where he is told that liquor would be available. He goes to a politico who supplies wine for votes, a star hotel, an Anglo-Indian group of youngsters, a fish market, a gambling den, a kulfi shop, and a brothel house, among other places, all in search of ‘quarter’. During his trip, he meets Saraswathi aka Saro (Lekha Washington), who attempts suicide after her parents scold her, and King-Prince, a father-son duo (both roles played by John Vijay) who runs a gambling center. How Sura, in the company of Marthandam and Saro, succeeds in his mission and leaves for Saudi forms the remaining story.