Its about the couple ponna and kali who doesn't have a heir to them.
It literally deals with the people how they treat and react. This is one of the books which was been banner and then republished.
This book deals with the a temple festival, on the last day of the festival, the childless women are allowed to have sex with the people in the festival, they think the men who were ready to inherit an heir are equal to god.
But ponna and kali weren't interested in this ritual. Ponna's brother had lured ponna to accept it stating that kali had approved it.
Kali on the other hand he was been taken to a coconut farm to drink. When he had boozed and dozed off, ponna had been tricked to leave for the 18th day of festival.
When kali had regained his consciousness he had started to go back to home. But he found ponna wasn't there. He feels betrayed and scream that she had cheated on him.