Azhagu (Vimal) and Mike (Soori) are thick friends and happy-go-lucky jobless youths who just roam around doing nothing. They meet Priya (Priya Anand) in a train while trying to escape from a few goons who were chasing them for a reason. Initially, they take Priya for a prostitute but later understand that she is a doctor. Azhagu falls for her immediately and decides that he should become an engineer so that he can marry her. Priya is saved by Azhagu from a man who tries to kill her. Azhagu then listens to her story.

Priya had a friend named Kalpana (Vishakha Singh), who was from a village where Priya went for a medical camp. There, she learns that the people of that village are affected by potential cancer and other effects due to the steel factory owned by Selva Vinayagam (Nassar). Priya enters the company with the help of Kalpana, who works there. Priya gathers proof and talks with Selva to provide safety equipment to the workers so that no one gets affected further. However, Selva denies and insults Priya, who leaves the place. Back in the factory, Kalpana operates a costly machine and unfortunately gets her hand stuck in it, resulting in huge blood loss. Priya begs the owners to dismantle the machine so that Kalpana can be saved, but the owners are reluctant, and Kalpana dies as a result. Priya decides to sue the company and files a case against them. The case is being heard the next day, and if Priya makes it to court, the company will lose the case. She is being targeted by Selva's men. How Azhagu and Mike help Priya escape the goons and whether they help her win the case forms the rest of the story.

The story is centered on a factory in Kayalpattinam (Thoothukudi) which explores the safety of laborers in factories being at jeopardy. It was a noble effort by Kannan to have raised an awareness and caution to incorporate safety standards in order to avoid any untoward incident that may harm the laborers' lives and lifestyle through this film. After the film's release, one of the most fatal incidents due to oversight in the industrial safety measures happened at Ranipet Sipcot industrial estate in Vellore district when a tank of an effluent treatment plant collapsed on the compound wall of an adjacent factory where the employees were present. 10 workers died as a result of this incident.