| Director | Salangai Durai |
|---|
Kathavarayan sells illicit arrack in Hogenakkal, Dharmapuri. Though he is involved in arrack trade, he is honourable. Malti, a student, arrives in the village as part of her NSS project. She vows to end the arrack menace in the village and takes efforts to arrest Kathavarayan. Thanks to her efforts, Kathavarayan is arrested and imprisoned in Chennai.
Malti's efforts to expose drug peddlers in Chennai backfires. The peddlers hatch a conspiracy, and Malti falls a prey to it. She is arrested for possessing drugs and is imprisoned. Kathavarayan leaves jail to retaliate against Malti, but he learns her real intentions and dire situation. He masterminds and joins the drug-peddling gang and eventually exposes them to save Malti.