"Honest" Raj, a police officer in a coma for four years, wakes up suddenly. Abhinaya, a newly appointed doctor, saves him from a killer with the help of Raj's assistant Velu.
10 years ago, Raj lived with his mother Maragatham in Chennai. Maragatham was a Bank officer, and Raj was a graduate searching for a job. When Maragatham's Bank was taken hostage, Raj came to rescue and defeated the robbers. The City police reward him, and the commissioner asks him to attempt Public service exams for Indian Police Service. Raj complies and after the exams, mom-son duo visit Maragatham's native village for a vacation. Pushpa, a village girl, fell in love with Raj and they get engaged. Raj's best friend Varatha attempted to suicide after his father's creditors pressured him. Raj saved him, and Varatha lent his printing press company to Pazhani. Raj and Pushpa got married, and he passed the IPS exam successfully. Varatha found counterfeit money in his factory and started an illegal business with Pazhani. Bharatha then became rich and killed his partners.
Raj came back with his mother, wife, and son Babloo to see Varatha. Raj found an illegal business thanks to Kesavan, a former henchman of Varatha. Even though Varatha was his best friend, Raj tried to arrest him. Varatha soon killed his wife and mother. To save at least Babloo, Raj was hurt by bullets and lapsed into a coma. Gopalakrishnan, a veteran police officer, took care of Babloo.
Raj decides to take revenge and punish the culprit. Varatha kidnaps Babloo and threatens to kill him. Raj saves Babloo; kills Varatha, who does not want to surrender; and marries Abhinaya.