Damayanti is a professor of history. Incidentally, he is known to have a natural ability to unravel the mystery of any anti-social crime. Since then she has been helping her engineer husband Samaresh Dutt Gupta's friend Shiben of Kolkata Police Detective Department to solve some complex mysteries. His logic, intellect, ability to analyze a situation correctly etc. have solved many crime mysteries.This is not unusual. Just as a historian sheds light on the character of a vanished people from the ruins of an ancient civilization or the torn pages of a manuscript, so Damayanti brings out the true form of a mystery from various sources.