Saidai Sathya (Sundar C) has little respect for the law. He parks his car in the middle of the road and creates trouble for other vehicles. A traffic policeman Kandasamy (Vivek) ignores that violation because he is a close friend of Sathya. A social activist and lawyer Udhayamoorthy (Vijayakumar) drags both of them to court for obstructing traffic and causing a nuisance. The court sends them to the Madurai Gandhi Museum for help, where they meet a college student named Meenakshi (Anjali). After Sathya is discharged, he starts a job as a henchman. VBR (Manivannan), a villainous former minister, sends him to steal a confidential file containing vital evidence on the death of collector Leelavathi (Sukanya) at Udayamoorthy’s place. While he is stealing the file, Udayamoorthy is accidentally killed by Sathya. While dying, Udayamoorthy blesses Sathya by saying “Vazhga Valamudan” (Long Live). These last words haunt Sathya, and filled with remorse, he vows to carry on Udayamoorthy’s good work. He gathers evidence to discover Leelavathi’s murder. Sathya continues with his task of exposing VBR and adopts Gandhian principles of nonviolence and peaceful satyagraha. Ezhumalai (Napoleon) is a police inspector who vows to avenge the death of his brother Udhayamoorthy. He thinks Sathya killed him, although he later finds out that he did not. Sathya sits near the Gandhi statue and follows his examples of nonviolence, confident VBR will be arrested. VBR surrenders himself to the police and is arrested. The film ends with Sathya getting the justice.