A village cook Ramji goes to Australia to become a chef at a multi-millionaire Indian's home. Unfortunately, the millionaire dies of indigestion the day Ramji arrives, leaving him jobless with an expired visa. Desperate to stay and earn, he starts working illegally as a cook, but to stay on, he needs to get legal. A solution comes up when Damayanthi, a free-spirited biker, agrees to marry the docile cook for a price.

The film revolves around five individual characters and the events in their life, that, on the one hand, changes everything in their respective lives, which the film's title refers to, and, on the other hand, also brings together these people. It is an anthology film, that contains two parallel moving stories, which are connected by a freak accident in Chennai. A young architect, falls in love with a young beautiful pediatric doctor, runs after her and tries to convince her to marry her, while, simultaneously, a morose ex-football coach troubles a software engineer by vowing to kill his eight-year-old son. How these characters get connected and confronted through the accident forms the crux of the story.

Siva comes to Madras from a small Tamil Nadu town to study. He instantly falls in love with elusive stranger Priya who resists his charms quite persistently. Madhavan later discovers that romancing Priya can be a dangerous hobby.

A professional assassin is tasked with the murder of a prominent local judge; however, after a series of failed attempts, he is forced to deal with complications and old relationships arising from his troubled past.

ACP Bose (Karthik) is a sincere police officer happily married (Anu Hassan) and living with his parents and younger brother Velu (Arun Vijay). Velu is a college student and he falls in love with his classmate Anjali (Dhansika). Umapathi (Chandrasekar) enters, who is notorious for settlements and land deals. He kills anyone who comes in his way and does not leave any evidence or witness behind. He takes a loan of 100 crores from a private bank with the help of a cunning DGP and a politician. He kills the bank’s chairman in order to avoid repayment and puts the blame on Bose. Bose tries to stop Umapathi. Velu also gets into disputes with Umapathi. What happens next forms the crux of the story.

Surya, an aimless youngster, gets emotionally attached to his first bike ‘Ustaad’, playing a catalyst in his personal and professional journey, stimulates him to conquer acrophobia and to become a pilot and to win over the love of his life, Meghna.

Nandu and Vijay are brothers who were abused by their stepmother during their younger days. Nandhu, who is mentally ill, decides to kill Vijay's fiancee as he visualizes her as his stepmother.

A rock star must overcome his psychological inhibitions to seek revenge for his parents' death.

Irandu Mugam is a political film with social message.It is a double hero subject with Sathyaraj and Karan playing the roles. The female leads are Anika and Suhani.