Aravind (Saravanan) and Parthasarathy alias Pacha (Selva) are small-time crooks who don't have any relatives. They meet each other in jail, and the two soon become good friends. After their release from jail, Aravind doesn't know where to go, so Parthasarathy accommodates him at his home.

Both continue to steal. One day, they steal money from an old village man Korai Kaluthu Kuppusamy (Kuladeivam Rajagopal). The next day, the old man dies from a heart attack. Feeling guilty, Aravind tries to help the late Kuppusamy's family. Aravind decides to become a good man, but Parthasarathy does not want to change and strongly believe that the society will not accept it. Aravind gets married with Anandavalli (Sithara), who was brought up in a prostitute house environment, but not a prostitute. Meanwhile, Parthasarathy falls in love with Kuppusamy's granddaughter Daisy (Nandhini). Parthasarathy then clashes with the dreaded don Kondaiah (Chitti).

After he witnesses Daisy's father immolating himself for not paying back debts to Kondaiah. Pacha avenges his death by brutally slashing Kondaiah's leg. Inspector Vijay (Thalaivasal Vijay), corrupt, cat-eyed inspector who earlier arrested Aravind and Pacha decides to investigate the murder. He arrests Aravind and shoots him on the pretext of getting him released.

The cat-eyed inspector Vijay also arrests Anandavalli at a nearby departmental shop when she goes to purchase baby food. The inspector was in no mood to listen to her appeal that, the baby is alone at home and takes her to police station for further enquiry.

On next day morning, she is released from police station based on the recommendation of prostitution house head-lady, who is well known to Inspector Vijay.

When she heads to home, she is shocked to see that the baby is dead due to a day long hunger.

As Anandavalli is deeply saddened by Aravind's death while also losing her baby in the process. She murders Vijay and gets arrested with Pacha lamenting that police never lets criminals to lead a peaceful life.