Amitava Chowdhury is an author and a businessperson , who always remains busy with his job schedule . Amitava has a sister and a special type of polio affects her . Suparna and Aparna are two sisters from a very upper class cultured family . Amitava feels a soft corner for Suparna , then Amitava marries Suparna , but after their marriage , Suparna feels awkward in Amitava's house . His sister cannot tolerate Suparna . On a picnic day while she was traveling with Suparna , faces an accident and die . Everybody thinks it as an accident , but originally it is a preplanned murder . Later Amitava explains the whole incident in court and accept the court's judgme .