Ek Hasina Thi is a story, set in the eastern megapolis of Kolkata. It is not a revenge story but a story of the female protagonist, Durga, seeking justice for a crime committed in the past. Her methods of claiming justice are unconventional as she steps out of the shackles of traditionalism and utilises her Mind to conquer Might! The show tracks the journey of Durga as she attempts to stand up to the power and might of the influential Goenka family. Will Durga be successful in her mission or will she too fall aside like every other person who has stood in the way of the Goenkas? Who will reign supreme in this challenging battle of wits and intellect, where everything seems to be a fair game!
A glamorous reception at businesswoman Angela Mahler's mansion attracts high society: businessmen, powerful women, and bons vivants looking for some fun. Unexpectedly, a body is found in the pool and what was a party, becomes a crime scene. Thus begins a frantic hunt for the murderer. Trapped inside the house and in the investigators' crosshairs, all the guests are suspects. The story occurs over a 24-hour period in a web of suspense, ambition, ulterior motive and uncontrollable passion.
The twists and turns of Ridho and Mei's love story, who are together because of an arranged marriage by their parents. They disliked each other at first because they were mortal enemies and already had a partner respectively. However, their parents insisted that the two of them marry and form a new family. As time went by, neither Ridho nor Mei realized that the seeds of love had finally grown between them. Ridho felt jealous when Mei started paying attention to other men. Likewise, Mei started to feel the same way. Mei continues to be jealous when she sees Ridho approaching other women.