National Pictures

Mohanasundaram, a philanderer and drunkard, gets married to Chandra after he returns to India. Though he has a wife, he develops a relationship with Kantha, a prostitute.

Gunasekaran leaves Burma in the midst of World War II in order to return to India and attend his sister's wedding. However, tragedy befalls the family and they must find their place in a new Madras.

Sonar Harin brings out the grimy and shady side of society and demonstrates how often innocent people, under fate, fall into this sullied whirlpool.